The statement that is best supported by the graph is that trade between nations increased from the year 1980 to the year 2011.
The graph in this question shows the upward trend in the global trade per percentage of GDP.
In the year 1980, the trade was at 40% of GDP, in the year 1990 it was at 41% of GDP, in the year 2000 it grew significantly t0 50% of GDP while in the year 2010 it grew to 60%
It can then be concluded that the trade between nations increased from the year 1980 to the year 2011
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