Australian Bureau of Statistics

Rate the ABS website
ABS Home > Statistics > By Catalogue Number
ABS @ Facebook ABS @ Twitter ABS RSS ABS Email notification service
3302.0.55.001 - Life Tables, States, Territories and Australia, 2010–2012  
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 07/11/2013   
   Page tools: Print Print Page Print all pages in this productPrint All RSS Feed RSS Bookmark and Share Search this Product



TECHNICAL NOTE 1: THE EFFECT OF REBASING ON ESTIMATES OF LIFE EXPECTANCY

Rebasing and recasting ERP

1 After each Census, the ABS rebases ERP to the latest Census count. For the 2011 Census, the ABS made a major methodological change to the Census Post Enumeration Survey (PES), to better estimate the level of undercount in Census counts. This new methodology, Automated Data Linking, resulted in a better, but also considerably lower, estimate of undercount. The ABS also estimated that the PES would have estimated lower levels of undercount for previous Censuses, had the methodology been available.

2 As part of the final rebasing process, the ABS therefore undertook an additional process (referred to as ‘recasting’), whereby revisions to historical population estimates were made back to September 1991. For more information on rebasing and recasting please refer to the following two feature articles released in Australian Demographic Statistics, Dec 2012 (cat. no. 3101.0):

  • Final Rebasing of Australia's Population Estimates, September Quarter 2006 - June Quarter 2011
  • Recasting 20 Years of ERP

Impact on estimates of life expectancy at birth

3 Population estimates, together with deaths data, are a critical input into the method used to derive life tables and life expectancy estimates. Any major downward revision to population estimates will inevitably have an impact on estimates of life expectancy, as the mortality experience in the population references a smaller number of people (or larger number when estimates are revised upward).

4 Unlike most demographic series the ABS produces, the time and resources required to derive life tables are such that they are never revised, even after a rebasing period is concluded. This means that estimates of life expectancy are not strictly comparable across intercensal periods, though the differences are usually so small as to not limit their effective use as a time series. This is less true for comparisons between the 2009-11 and 2010-12 life tables.

5 The following table shows the difference between recent estimates of state and territory life expectancy at birth, and the new 2010-12 estimates, which used rebased and recasted ERP. The largest impact of the rebasing and recasting process on life expectancy at birth estimates is expected to be for Queensland, given it also experienced the greatest relative revision during rebasing. The ABS plans to undertake further analysis to explore the impact of changing denominators (e.g. unrebased, preliminary rebased and final rebased ERP) on life tables and life expectancy estimates. The results of this analysis will be released in Life Tables, States, Territories and Australia, 2011-2013 (cat. no. 3302.0.55.001) in November 2014.


TABLE 1. STATE, TERRITORY AND AUSTRALIA LIFE EXPECTANCY AT BIRTH -
2005-2007 to 2010-2012

2005-2007
2006-2008
2007-2009
2008-2010
2009-2011
2010-2012
years
years
years
years
years
years

MALES

New South Wales
79.1
79.2
79.5
79.6
79.8
79.9
Victoria
79.5
79.6
79.7
80.0
80.3
80.5
Queensland
78.9
78.9
79.1
79.4
79.5
79.5
South Australia
78.8
79.2
79.3
79.4
79.7
79.8
Western Australia
79.2
79.3
79.5
79.7
80.1
80.1
Tasmania
77.7
77.7
77.9
78.0
78.3
78.7
Northern Territory
72.4
72.6
73.3
74.0
74.9
74.7
Australian Capital Territory
80.3
80.1
80.5
80.5
81.0
81.2
Australia
79.0
79.2
79.3
79.5
79.8
79.9

FEMALES

New South Wales
83.8
83.9
84.3
84.1
84.2
84.2
Victoria
83.8
83.9
84.1
84.3
84.4
84.5
Queensland
83.6
83.7
83.8
83.9
84.1
84.0
South Australia
83.9
83.8
83.9
83.8
84.0
84.2
Western Australia
84.0
84.0
84.1
84.3
84.6
84.8
Tasmania
82.4
82.3
82.2
82.3
82.5
82.6
Northern Territory
78.4
78.4
79.0
79.2
80.5
80.0
Australian Capital Territory
84.0
84.0
84.3
84.7
84.8
85.1
Australia
83.7
83.7
83.9
84.0
84.2
84.3


Further information

6 For more information see Technical Note 2: Improvements to Mortality Estimation at the Highest Ages, 2010-2012, Final Rebasing of Australia's Population Estimates, September Quarter 2006 - June Quarter 2011 and Recasting 20 Years of ERP.


Bookmark and Share. Opens in a new window

Commonwealth of Australia 2014

Unless otherwise noted, content on this website is licensed under a Creative Commons Attribution 2.5 Australia Licence together with any terms, conditions and exclusions as set out in the website Copyright notice. For permission to do anything beyond the scope of this licence and copyright terms contact us.