This trend has continued into the 2000s for the United States, but has partly reversed in Canada and has more than fully reversed in Mexico. Of course, since other elements of the policy  12  architecture that affect income distribution have not remained constant through this period, we make no claim that these patterns are driven by trade.
Chart 6: Trend in income distribution across North American countries Income share held by highest 10% over income share held by lowest 10%, annual, 1991 (1992 for Mexico), 2000, 2010  35 30 25  1991 (for Mexico 1992) 2000 2010  20 15 10 5 0 Canada  United States  Mexico Last observation: 2010  Sources: World Bank, Haver Analytics and Bank of Canada calculations  Shifts in income distribution could have implications for the standard open-economy models that policy-makers rely on.