http://www.fin.gc.ca/budget06/bp/bpc3d-eng.asp names the amount for National Counterfeit Enforcement Strategy in 2006 as $9 million. I don't think these are the total expenses on preventing counterfeits, but it's within an order of magnitude. The official population count in the 2006 census was 31,612,897, so let's say the number of people who have paid any tax that year is around 30 million. Corporate taxes would complicate the "per taxpayer" calculation a little bit, but they would only make the amount smaller.