The 2006 Revision builds on the 2004 Revision and incorporates both the results of the 2000 round of national population censuses and of recent specialized surveys carried out in countries around the world. These sources provide both demographic and other information to assess the progress made in achieving the internationally agreed development goals, including the Millennium Development Goals (MDGs). The comprehensive review of past worldwide demographic trends and future prospects presented in the 2006 Revision provides the population basis for the assessment of those goals. This volume presents detailed information about the composition of population by age and sex.