Korean Social Science Data Archive - A service program to search standard data instantly, and get the outcome of statistical analysis. Singapore - Singapore National Statistics Office. China Dimensions - China data and GIS information. Hong Kong - Census and Statistics Department. Comparative Study of Aging and Health in Asia (AHA) - AHA is a multi-country collaborative study of health among older Asians. The project uses existing longitudinal survey data to study health transitions in four Asian countries: Taiwan, the Philippines, Singapore and Indonesia. Cambodia: National Institute of Statistics - Census demographics updated each year.