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1991 Feature Article - The Census of Population and Housing
TABLE 1. CENSUS COUNTS AND GROWTH
In the course of the past 80 years, the annual rate of growth has fluctuated from below 1 per cent during the two World Wars and the Depression to over 3 per cent at the end of the 1940’s when Australia began accepting large numbers of settlers from Europe. During the 1980’s, the average annual growth rate was 1.5 per cent.
GRAPH 1. POPULATION GROWTH, AUSTRALIA
Throughout, growth has been due to two factors: natural increase, which is the difference between births and deaths and net overseas migration. Some notion of the relative impact of the two components on population size can be gained by examining the growth rates of the Australian-born and the overseas-born populations separately.
In 1986, most of Australia’s people were still to be found in New South Wales (35 per cent) and Victoria (26 per cent) despite the steady decline in their shares of population over the past 25 years. The next most populous State, Queensland, had 17 per cent of the total population, an increase over the 15 per cent share it had in 1976. South Australia and Western Australia had about 9 per cent of the population each, although their growth patterns have been quite different. South Australia’s share of population has been declining since 1966 while that of Western Australia has increased steadily. In 1986, Western Australia’s population exceeded that of South Australia by 61,000; in all previous census counts, South Australia’s population had been the larger. The remaining people were divided between Tasmania (3 per cent), the Australian Capital Territory (2 per cent) and the Northern Territory (1 per cent).
TABLE 2. STATE AND TERRITORY SHARES OF AUSTRALIAN CENSUS COUNTS
Australia’s people are highly urbanised and also concentrated in a small number of large cities, situated mainly along the eastern and southern seaboard. In 1986, over 10 million people, or 64 per cent of Australia’s population, lived in the six State and two Territory capital cities, compared to 9 million, or 65 per cent, in 1976. In Victoria, South Australia and Western Australia, the State capital city had over 70 per cent of the State’s population in both 1976 and 1986 and each had a population more than ten times greater than that of the next largest city in the State. In 1986, Sydney (3.5 million) had 22 per cent of the national population and Melbourne (2.9 million) had 18 per cent, in both cases a slight decline from 1976. These largest two cities, together with Adelaide and Hobart, grew at rates significantly lower than the national average.
TABLE 3. POPULATION OF CAPITAL CITIES 1976 AND 1986
Ageing of the population
The age structure of the population has been changing. People are living longer and women are having fewer babies. Between 1976 and 1986 the number of children (aged 0 to 14 years) declined from 3.7 million to 3.6 million, the first time that this has occurred. Among older people however, there have been marked increases with the number of people aged 65 to 84 years rising from 1.1 million to 1.5 million and the number aged 85 years or more rising from 82,000 to 127,000 in the same period. Comparing these changes to changes in the size of the population aged 15 to 64 years gives an indicator of the extent of the structural shift in age. The youth ratio has decreased since 1976 while the elderly and aged ratios have increased.
TABLE 4. SUMMARY MEASURES OF POPULATION: AGE AND SEX
There has been an increase in the median age of the population since 1976, from 28.3 years to 31.0 years in 1986. In the period 1954 to 1976 however, when both overseas migration and the birth rate were particularly high, the median age of the population decreased.
Households and families
The number of households has been increasing at a faster rate than the number of people living in them. Between 1976 and 1986 the number of households increased by 25 per cent (from 4.1 million to 5.2 million) while the number of household members increased by 15 per cent (from 12.9 million to 14.9 million people). This resulted in average household size declining from 3.1 people in 1976 to 2.9 people in 1986.
The shift to smaller households can also be seen in the declining proportion of households with four or more people and the increase in the number of one and two person households. In 1976, 39 per cent of all households had four or more people, but by 1986 this proportion had declined to 33 per cent. The number of lone person households increased by 55 per cent and the number of two person households by 34 per cent in the ten year period.
GRAPH 2. HOUSEHOLDS: INCREASE IN NUMBER, CLASSIFIED BY SIZE, 1976-86
Non-family households increased by 18 per cent between 1981 and 1986. Although this rate was greater than that of families, there had been a slowing down in the rate of non-family household formation when compared with the 1976-81 period. This slowing down is likely to be due to the more stable and lower divorce rate in recent years after the initial impact of the Family Law Act.
A comparison of the number of families in 1986 with the number according to earlier censuses is possible only in terms of estimates of the major family types because of changes in the way families were counted in 1986. In the following comparisons, the 1986 family data have been adjusted to achieve as much comparability as possible with earlier census data; however, it has not been possible to adjust for all the changes in definitions introduced in 1986.
TABLE 5. FAMILIES AND HOUSEHOLDS, GROWTH BY TYPE
The number of families increased by 7.4 per cent during the years 1981 to 1986, slightly greater than the increase in population and less than the 8.5 per cent increase during the preceding 5-year period. Families consisting of a couple with children or other family members showed the smallest increase although they were still greater in number than the other family types. The rate of growth in other family types during 1981-86 was slower than during 1976-81.
Labour force participation
While the overall rate of labour force participation of persons aged 15 and over changed by only 1.4 percentage points between the 1976 and 1986 Censuses, there were considerable changes in the composition of the labour force. In 1976, 44 per cent of women aged 15 years and over and 79 per cent of men aged 15 years and over were in the labour force. In 1986, equivalent figures were 48 per cent of women and 75 per cent of men. The decline in labour force participation of men occurred in all age groups except 20 to 24 years while the growth in womens’ participation occurred at all ages except 55 years and over.
The increase in labour force participation of women was particularly large among married women aged 25 to 54 years, the ages traditionally associated with raising a family.
TABLE 6. LABOUR FORCE PARTICIPATION RATES(a)
There was a decline in labour force participation of both men and women in the 55 to 64 years age group. Among men in that age group the decline was quite marked, from 78 per cent in 1976 to 63 per cent in 1986. Among women, who had considerably lower rates of participation to start with, the decline was much smaller, from 27 per cent to 23 per cent.
Data for small areas and small groups of the population
While the preceding paragraphs give some idea of the ways in which census data throw light on the composition and characteristics of the population in a national sense, there is another side to the census. It also provides the characteristics of the population and its housing within small areas and for small population groups. Data of this kind are critical to many planning, administration and policy development activities of governments, businesses and other users.
Although some of this information is available from other sources, only a census can provide it for small geographic areas and small population groups.
The consultation process: 1991 Census
Planning for the 1991 Census began before the 1986 Census was conducted and early in 1988, the ABS sought public comment on its preliminary views about the content of the 1991 Census.
More than 560 submissions were received and these were followed up by consultation with major users and other parties. After this process, the final recommendations were drafted, which, following discussion with the Australian Statistics Advisory Council, led to the Government announcing a decision on the content of the 1991 census in May 1989.
Planning the products and services to be released from the 1991 Census also began three years ago. Product development has evolved as a result of experience gained in the release of the 1986 Census output, due to changes in the types of products and services required by users and the way in which they want statistics presented.
As part of a strategy to provide client orientated output, the ABS has, for the past two years, been involved in a national census user consultation program, including:
This activity has resulted in many modifications to the content of proposed products. Typical requests from users are:
To date approximately one thousand census users have had their say in the design of 1991 Census products and services. Current plans for 1991 Census products and services are described below.
1991 Census products and services
Census products will be available in the form of printed publications, microfiche, magnetic tape, floppy disk and compact disk.
Printed publications will continue to be used to disseminate both the broad results and many of the detailed statistics from the Census. Statistical publications planned include the following:
A number of reference publications will enable clients to understand what the census data and various geographical codes mean. These include "The 1991 Census Dictionary (cat. no. 2901.0)" and "The Directory of 1991 Classifications (cat. no. 2904.0)".
For the 1991 Census, customised matrixes (cross-classified tables) will be available much earlier than for the 1986 Census. Clients have the opportunity to specify the tables they want before the census is conducted. In this way the ABS will be in a position to produce the matrixes soon after final data become available. Orders are being taken now.
Geographical comparisons at State, capital city or regional level will also be produced. At the State level these consist of counts for every class of all the data items for each State. For smaller areas, some collapsing of classifications may be necessary to protect confidential information.
A group of products known as community profiles will be available for the 1991 Census. These products replace the various sets of tables released from previous censuses which were known as small area summary data. The statistics will continue to be simple tables showing two or more key census variables but the tables have been extensively revised.
As well as standard community profiles, clients are able to specify their own combination of census geographic areas and particular tables from the profile data base to obtain a community profile customised to their needs.
The profiles are to be available on most output media, according to the preference of the client and may be printed on demand at all ABS Information Services locations. Standard community profiles will also be available, free of charge, to major public libraries.
A most successful product from the 1986 Census was CDATA86 - a small area profile database on compact disk which was accessible via a CD-ROM reader by micro computer. The disk also contained data manipulation and statistical mapping software. For the first time the ABS was able to put a comprehensive profile database directly in the hands of users in a form that could be accessed using relatively simple technology.
The ABS aims to build on this success with the production of CDATA91. CDATA91 is likely to contain data from the 1986 and 1991 Censuses with improved interface, software and documentation. It will include significantly enhanced mapping facilities. Training will be provided at different levels to complement the varying levels of expertise existing among users.
Collection district maps will continue to be available in hard copy and microfiche form.
CMAP91, a new product proposed for the 1991 Census, will contain the complete set of census collection district maps on CD-ROM, at both the national and State/Territory level.
Digitised boundary files will also be available for all standard geographic areas.
Further information and consultation
Many of the proposed products have yet to be finalised and further user consultation will be undertaken.
Census Update (cat. no. 2902.0) is a quarterly newsletter designed to keep clients informed of developments in products and services and advised of customised tables available for resale. The first issue will be released in September this year.
There is an early bird offer to provide potential users with an opportunity to obtain customised matrixes as soon as the census data are available.
If you wish to discuss this offer or to place orders for customised matricies, contact Maree Curran on 02 - 6252 5934.
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