The U.S. government estimates the total population at 8.8 million (midyear 2019 estimate). According to religious groups and December 2018 figures from the government Austrian Integration Fund, Roman Catholics constitute 57 percent of the population and Muslims – predominantly Sunni – 8 percent, while approximately 25 percent is unaffiliated with any religion. Other religious groups include Protestant churches (Augsburg and Helvetic confessions); Eastern Orthodox churches (Russian, Greek, Serbian, Romanian, Antiochian, and Bulgarian); Jehovah’s Witnesses; other Christian churches; and Jews and other non-Christian religious groups.