Singapore is also religiously diverse, with no religious group forming a majority. Religious freedom is guaranteed by the constitution of Singapore. Buddhism is the largest religion with about 33% of the population declaring themselves Buddhist. Other religions which exist in significant numbers include Christianity, Islam, Hinduism and Taoism. In addition to the "big five", there are also much smaller numbers of Sikhs, Zoroastrians, Jews, Baha'is and Jains. Some 17% of Singaporeans profess to have no religious affiliation.