Kazakhstan's 131 ethnicities include Kazakhs (63% of the population), Russians, Uzbeks, Ukrainians, Germans, Tatars, and Uyghurs.[19] Islam is the religion of about 70% of the population, with Christianity practised by 26%.[20] Kazakhstan officially allows freedom of religion, but religious leaders who oppose the government are suppressed.[21] The Kazakh language is the state language, and Russian has equal official status for all levels of administrative and institutional purposes.[4][22] Kazakhstan is a member of the United Nations, WTO, CIS, the Shanghai Cooperation Organization (SCO), the Eurasian Economic Union, CSTO, OSCE, OIC, and TURKSOY.