12 years old data, is that the basis for your argument? 

'The supply-management system is hugely beneficial to a relatively small number of farmers, but it raises costs for millions of consumers. A C.D. Howe Institute study found that, between 2005 and 2011, the price differential between Canada and the U.S. for milk, eggs and cheese ranged from 29 to 77 per cent.'

Think Tanks have their own stats.