The US business cycle was  3  also a contributor. Since 2010, a modest uptrend in trade penetration has resumed in Canada.
Chart 1: Evolution of the trade penetration of North American countries Nominal merchandise imports and exports as a share of GDP, annual, 1980–2015  0  World  AdvancedEconomies economies Advanced  Canada  Sources: International Monetary Fund, Haver Analytics and Bank of Canada calculations  United U.S. States  2014  0 2012  10 2010  10 2008  20  2006  20  2004  30  2002  30  2000  40  1998  40  1996  50  1994  50  1992  60  1990  60  1988  70  1986  70  1984  80  1982  %  80  1980  %  Mexico Last observation: 2015  By this simple measure then, one would conclude that the three NAFTA countries have become more integrated with the global economy during the past 30 years, especially Mexico.