Religions of the world

• Christians 33.32% (2.1 billion)
  • Roman Catholics 16.99%,
  • Protestants 5.78%,
  • Orthodox 3.53%,
  • Anglicans 1.25%
• Muslims 21.01%, (1.5 billion)
• Hindus 13.26%, (900 million)
• Buddhists 5.84%, (376 million)
• Sikhs 0.35%, (23 million)
• Jews 0.23%, (14 million)
• Baha'is 0.12%, (7 million)
• other religions 11.78%, (see below)
• non-religious 11.77%, (combined with atheists, 1.1 billion)
• atheists 2.32% (combined with atheists, 1.1 billion)

[Source: https://www.cia.gov/library/publications/the-world-factbook/print/xx.html]

OTHER religions broken down:

Jainism: 4.2 million
Shinto: 4 million
Cao Dai: 4 million
Zoroastrianism: 2.6 million
Tenrikyo: 2 million
Neo-Paganism: 1 million
Unitarian-Universalism: 800 thousand
Rastafarianism: 600 thousand
Scientology: 500 thousand

[Source: http://www.adherents.com/Religions_By_Adherents.html]