Comparability of data Readers should be aware that differences in statistical methods might affect crosscountry comparability, although every effort has been made to minimise the impact of this. The UNECE takes an active role in work to harmonise definitions and methodology wherever possible. Primary sources, such as the websites of national and international statistical offices, should be consulted for more detailed statistics, descriptions, and technical notes, which may give users a greater insight into issues of comparability. Data not available The indications ‘data not available’ or ‘..’ signify that recent values for these particular data are not currently available in the UNECE Statistical Database. It is possible that some of these data are available from other official sources. GDP data The national accounts estimates are compiled according to the System of National Accounts 2008 in all EU countries, Canada, Iceland, Norway, Serbia, The former Yugoslav Republic of Macedonia, Ukraine and United States. The remaining countries follow the System of National Accounts 1993. Some elements from the System of National Accounts 2008 may be implemented also in these countries. Total and per capita estimates in common currency (US Dollars) for GDP and GDP components may differ slightly for some countries from the estimates published by other national and international data sources, because of differences in the population and national accounts data used. Common currency estimates are computed using purchasing power parities (PPPs). For EU and OECD countries PPPs are compiled annually and, for other countries, projected based on the results of the most recent International Comparison Program (currently 2011). Data for GDP and its aggregates for the most recent periods are preliminary and are subject to further revision by countries when more exhaustive source data become available. GDP and employment by major sectors As detailed in the glossary at the end of this publication, groupings of economic activities follow the International Standard Industrial Classification of all Economic Activities (ISIC). Most countries apply the ISIC Revison 4. It is indicated in the the country profile whether the ISIC Revision 4 or 3.1 is used. Women and men in selected occupation groups For European Union member countries, Iceland and Norway, the selected occupation groups correspond to first-level categories in the 2008 version of the International Standard Classification of Occupation (ISCO-08). The reference classification for other countries is the 1988 version (ISCO-88).
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