Christianity is the dominant religion, with Roman Catholics constituting an estimated 80% of the total population and Protestants constituting about 15% in 2002. The primary protestant groups are Seventh-Day Adventists and evangelicals. Approximately 3% of the population are Muslim. About 2% are atheist. A very small number of people practice forms of witchcraft, but this is considered more of a custom than a religion and practitioners are often adherents of one of the other major religions.