Implementation of the 1993 SNA in Canada - Backcasting Issues - ARCHIVED

The 1993 System of National Accounts (SNA) was implemented in Canada in November 1997 and all national accounts series - annual, quarterly and monthly, both at current and constant prices - were revised back to 1961. There were changes in classification of sectors and transactions, concepts and methodology. As well, we removed the statistical breaks in earlier series that arose due to our revision policy. In the spring of every year, we revise, if necessary, our national accounts series for the latest four years. Statistical breaks for earlier periods are removed only at the time of historical revisions, such as the one done in November 1997. This was the fifth and the most comprehensive historical revision of the Canadian SNA series since 1961, the earlier ones were done in the late 1960s, the late 1970s, in 1985 and in 1990. As our historical revisions have been done almost every decade, and more frequently since the 1980s, statistical breaks in the Canadian system have remained only for a short period.