The Australian Institute of Health and Welfare (AIHW) is Australia's national agency for information and statistics on Australia’s health and welfare. Statistics and data developed by the AIHW are used extensively to inform discussion and policy decisions on health, community services and housing assistance. Under Australia's constitution, health and welfare services are primarily delivered by the states and territories, who are also mainly responsible for the collection of statistics on these services. A fundamental aim of the Institute is to promote consistency among national, state and territory statistics, in order to produce comprehensive national data of the highest standard.