The World Development Indicators database was updated on December 15, 2011. The update features new external debt data, Doing Business and Enterprise Surveys indicators, immunization and tuberculosis series, and revised national accounts, balance of payments, monetary and government finance indicators, and education statistics. Emissions and energy-related data, including twenty new indicators, have been updated to coincide with the release of The Little Data Book on Climate Change. Most indicators are updated for 2010.
Below is a chart from the WDI database using the latest CO2 emissions (kt) by levels of income.