In national currency, in current prices and constant prices (national base year, previous year prices and OECD base year i.e. 2005) — and for comparative purposes in US $ current prices and constant prices (using exchange rate and PPPs). Expressed in millions and in indices. For the Euro area countries, the data in national currency for all years are calculated using the fixed conversion rates against the euro. It presents the three approaches of the GDP: expenditure based, output based and income based.
For more information see: http://stats.oecd.org/OECDStat_Metadata/ShowMetadata.ashx?Dataset=SNA_TABLE1&Lang=en