text: The following tables show carbon intensity of GDP in market exchange rates (MER) and purchasing power parities (PPP). Units are metric tons of carbon dioxide per thousand year 2005 US dollars. Data are taken from the US Energy Information Administration. Annual data between 1980 and 2009 are averaged over three decades: 1980–89, 1990–99, and 2000–09.
  In 2009 CO intensity of GDP in the OECD countries reduced by 2.9%  and amounted to 0.33 kCO/$05p in the OECD countries. ("$05p" = 2005 US dollars, using purchasing power parities). The USA posted a higher ratio of 0.41 kCO/$05p while Europe showed the largest drop in CO intensity compared to the previous year (−3.7%). CO intensity continued to be roughly higher in non-OECD countries. Despite a slight improvement, China continued to post a high CO intensity (0.81 kCO/$05p). CO intensity in Asia rose by 2% during 2009 since energy consumption continued to develop at a strong pace. Important ratios were also observed in countries in CIS and the Middle East.