At the Earth Summit in Rio de Janeiro in 1992, most of the world's governments adopted a program for action under the auspices of the United Nations Agenda 21, which included an Official Development Assistance (ODA) aid target of 0.7% of gross national product (GNP) for rich nations, specified as roughly 22 members of the OECD and known as the Development Assistance Committee (DAC). However, most countries do not adhere to this target, as the OECD's table indicates that the DAC average ODA in 2011 was 0.31% of GNP. The U.S. figure for 2011 was 0.20% of GNP, which still left the U.S. as the largest single source of ODA among individual countries.