Nominal world GDP and GDP of the Customs Union of Belarus, Kazakhstan and Russia in 2011. European Union: $17.1 trillion (25%) United States: $14.8 trillion (22%) China: $7.2 trillion (10%) Japan: $5.8 trillion (8%) Other countries: $22.2 trillion (32%) Customs Union of Belarus, Kazakhstan and Russia: $2.1 trillion (3%)