Developed by the Centers of Disease Control and Prevention, the FactStats provides statistical data on birth, death,sex, race and ethnicity of elderly populations of United States..
The WHO Health Data and Statistics provides access to data and analyses for monitoring the global health situationfor over 30 health themes ranging from health systems to disease-specific themes.
The Population Projections compiled by the Census and Statistics Department of Hong Kong SAR provide a detailed projection results, along with the projection methodology and assumptions.