This Yearbook is an annual compilation of a wide range of international economic, social and environmental statistics on over 200 countries and areas, compiled from sources including United Nations agencies and other international, national and specialised institutions. The 54th edition contains data available to the Statistics Division as of 31 December 2010 and presents them in 70 tables on topics such as: agriculture, forestry and fishing; communication; development assistance; education; energy; environment; finance; gender; international tourism; labour force; manufacturing; national accounts; population; prices; science and technology; and transport. The number of years of data shown in the tables varies from one to ten, with most tables covering the period up to 2008 or 2009. Accompanying the tables are technical notes providing brief descriptions of major statistical concepts, definitions and classifications.