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Supplementary codes are used to represent country-like entities and groups of countries (alternative standard country groupings and authorised standard output options) which are not part of the main SACC structure, and to process inadequate data in statistical collections. The codes are of five types:
Supplementary codes for inadequate data
Four-digit codes commencing with '000' are supplementary codes included for operational purposes to facilitate the coding of survey responses and other data which present particular problems in that they cannot be allocated a country, minor group or major group code. For instance, '0000' is used to code inadequately described survey responses, '0003' to code not stated responses, etc.
Supplementary codes for economic and other country groups
The SACC is intended to provide a single framework for classifying all statistical and administrative data by country for both population and economic statistics. Because the geographically based country groupings of the main structure are not always ideal for the presentation of economic data, alternative groupings have been included in the classification document to meet specific output needs. These country groupings are of two types:
These groupings have been allocated unique four-digit codes (beginning with '06') for processing purposes. For example, ASEAN is allocated code 0602, OECD is allocated code 0605, the former USSR is allocated 0613, etc. (see Appendix 1 for a full list of these supplementary codes).
Supplementary codes for economic and other entities
In some instances, the collection and aggregation of data for economic statistics (such as international trade and international investment position statistics) require data to be coded to entities that do not equate directly to a single country, or to countries at all. Such entities have been assigned unique four-digit codes beginning with '07'. For example, 'Belgium and Luxembourg' is allocated code 0704, Reserve Bank Gold is allocated code 0741, etc. It should be noted that although these supplementary codes are not part of the main classification structure, they should be considered when aggregating and presenting data for both the main structure and the alternative groupings (see Appendix 1 for a full list of these supplementary codes).
Supplementary codes for former countries and other geographic entities
Four-digit codes commencing with '09' are supplementary codes designed to code responses relating to entities which are now defunct as a result of recent political change but which are still regarded as useful for statistical purposes, and entities which are no longer separately identified in the revised main classification structure. These codes have two purposes:
For example, the codes 0901–0909 have been assigned to the Australian States and territories to facilitate coding in statistical or administrative collections that require data coded to the State level rather than directly to Australia. Conversely, the code 0912 is used to code responses relating to the former USSR that cannot be coded to one of the newly independent countries which were its former constituents. In some instances, the '09' codes are used to code responses that would otherwise be dumped as inadequately described. For example, the response 'Europe' is coded to 0911: 'Europe, not further defined' rather than to code 0000: 'Inadequately Described'. In some instances the '09' codes provide a more precise alternative than the supplementary codes relating to the main structure. For example, responses relating to the former Yugoslavia (which cannot be coded to its constituent countries) are coded to 0913: 'Former Yugoslavia, not further defined' rather than to code 3200: 'South Eastern Europe, not further defined'. It should be noted that these supplementary codes are not part of the main classification structure (see Appendix 1 for a full list of these supplementary codes).
Supplementary codes for the main classification structure
Four-digit codes ending with two or three zeros are described as 'not further defined' (nfd) codes. These codes are used to code responses to a survey or administrative question requiring a country response (such as country of birth) which cannot be coded to the most detailed (country) level of the main classification but which can be coded to a higher level of the classification structure.