The agency says Canadians spent $4.7 billion shopping in the United States in 2006.
Apart from a decline in 2009, the total has increased every year since then, hitting $8 billion in 2012.
Overall retail trade sales in Canada also increased every year from 2006 to 2012 except in 2009, when there was a 2.9 per cent decline.
Even with that one-year drop, annual sales rose to $468 billion in 2012 from $389 billion in 2006.
Cross-border shopping by Canadians in the United States accounted for 1.7 per cent of total Canadian retail sales in 2012.
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