Percent of world GDP - country data from around the world:
The average for 2014 was 0.56 percent.
The highest value was in the USA: 22.79 percent and the lowest value was in Vanuatu: 0 percent.
Below is a chart for all countries where data are available for: Percent of world GDP.
Definition: We calculated the world GDP as the sum of the GDP of all countries expressed in current USD. The share of GDP is the GDP of a particular country as percent of the world GDP. GDP at purchaser's prices is the sum of gross value added by all resident producers in the economy plus any product taxes and minus any subsidies not included in the value of the products. It is calculated without making deductions for depreciation of fabricated assets or for depletion and degradation of natural resources. Data are in current U.S. dollars. Dollar figures for GDP are converted from domestic currencies using single year official exchange rates. For a few countries where the official exchange rate does not reflect the rate effectively applied to actual foreign exchange transactions, an alternative conversion factor is used.