For example, the census conducted in 2002 revealed that 10 groups of indigenous peoples decreased in numbers and the census conducted in 2010 showed that 24 groups of peoples decreased in numbers. ! The Soviet Union collected information about indigenous peoples, and this information could be accessed for professional or academic purposes. Available statistics demonstrated positive dynamics in indigenous peoples' health. However, the restructuring of the health care system in the 1990s, as well as the abolition of ethnic identity in the Russian passport in 1997, led to the gradual end of the centralized collection and systematization of statistical information on indigenous peoples of the North.51 Countrywide reports by international organizations such as WHO,and the OECD do not pay specific information on indigenous peoples.