 “Over the past 30 years, median after-tax family incomes in Canada, those of the middle class, have only increased by 15 per cent.”
It is true that in three decades, from 1980 to 2011, incomes rose by 15 per cent. But the aggregate 30-year period misses other parts of the income growth story, including a higher-growth period starting in the late 1990s. 
['Canada']