Between 1980 and 2010 domestic material productivity of OECD economies improved, rising from 1 dollar per kilogram (2005 USD PPP) to over 1.8 USD/kg. Today, OECD countries generate 50% more economic value per unit of material resources used than in 1990 and 30% more than in 2000. Relative decoupling has occurred across all material groups and OECD regions, but there are only a handful of instances of absolute decoupling.