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The first step in the revision process was the introduction of a new classification structure to present merchandise imports and exports in various statistical programs. The new structure, named NAPCS Canada 2007, was published in August 2011 and revised in May 2012. It replaced the classification structures known as the summary import groups (SIG) and the summary export groups (SEG) that have been in use for several decades. International merchandise trade statistics were first published on the basis of the new classification on October 18, 2012.
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