SOURCE: Latest available data based on World Bank, World Development Indicators, available at https://databank.worldbank.org/reports.aspx?source=world-development-indicators#.

NOTES: GDP = gross domestic product; PPP = purchasing power parity. GDP estimates are converted into international dollars using PPP rates.

a. Population aged 14 or younger plus population aged 65 or older, divided by population aged 15 to 64.