Religious freedom is protected by law, and there is no state religion. However, the Roman Catholic Church, which signed a concordat with the government in 1954, is extended special privileges not granted to other religions. According to a 1997 population survey, professing Roman Catholics represented an estimated 68.1% of the population. Protestants, including Baptists, Jehovah's Witnesses, Methodists, Mormons, Seventh-Day Adventists, and other Christians accounted for another 11%. As many as 20.4% declared no religious affiliation whatsoever. It is believed that some Catholics may practice a combination of Catholicism and tradition Afro-Caribbean beliefs and customs. Other religions include Judaism, Islam, and Buddhism.