It's not as bad as I thought (not that other Christians are good but Catholics are a special kind of fucked up).
Source: International Bulletin of Missionary Research, January 2003. David B. Barrett & Todd M. Johnson.
Christians (total): 2,076,629,000 (33.1%)
Roman Catholics: 1,097,144,000
Evangelicals: 221,637,000
Pentecostal/Charismatics: 553,763,000
Anglicans: 82,895,000
Orthodox: 218,501,000
Protestants: 356,138,000
Just over half.