Motivation: Our national source for Sweden reports the retail sales index (current prices, value) in not seasonally adjusted (NSA) terms from January 1991.
Response: For international consistency, we have created a seasonally adjusted counterpart time series, WRIRATTAM.ISWE.
Properties: Both series have an index base of 2005=100 and begin in January 1991. Expect the SA supplement to be revised with each new historical value appended to the NSA fundamental.
Method: Adjust using the U.S. Census Bureau's X-12 ARIMA program.