The G20 countries plus a few enjoying the special relationship with U.S.


Note:

1). The number after the GDP, Population and Area figures is the ranking in the world.

2). The percentage after the Military Size and Spending is the one to the Population and GDP, respectively.


References:
https://www.cia.gov/library/pu.../the-world-factbook/
http://en.wikipedia.org/wiki/L...ries_by_GDP_(nominal)
http://www.globalfirepower.com/