World GDP Chart
Current World GDP: 73.89 Trillion USD
World GDP for Dec 2015
Mean: 25.07 Trillion USD
Median: 18.05 Trillion USD
Min: 1.35 Trillion USD (Dec 1960)
Max: 78.38 Trillion USD (Dec 2014)

World Gross Domestic Product in US current dollars (not inflation-adjusted).

Source: World Bank > World > World GDP