The religious heritage of Beijing is rich and diverse as Chinese folk religion, Taoism, Buddhism, Confucianism, Islam and Christianity all have significant historical presence in the city. As the national capital, the city also hosts the State Administration for Religious Affairs and various state-sponsored institutions of the leading religions.  In recent decades, foreign residents have brought other religions to the city. According to Wang Zhiyun of the Chinese Academy of Social Sciences in 2010 there were 2.2 million Buddhists in the city, equal to 11.2% of the total population. According to the Chinese General Social Survey of 2009, Christians constitute 0.78% of the city's population. According to a 2010 survey, Muslims constitute 1.76% of the population of Beijing.