Percentage of adherents to the 5 major religions comparisons

Christianity

Mr. Schick- 30% of the population of the world adhere to this religion
CIA World Fact Book- 31.4% of the worlds population adhere to this religion
adherents.com- 33% of the world adhere to this religion

These statistics for Christianity seem to be true since they all stay within 3% of eachother

Islam

Mr. Schick- 22.6% of the world adhere to this religion
CIA World Fact Book- 23.2% of the worlds population adhere to this religion
adherents.com- 21% of the world adhere to this religion

These all once again stay within 3% of each other and seem to be true

Hinduism

Mr. Schick- 14.6% of the world adhere to this religion
CIA World Fact Book- 15% of the world adhere to this religion
adherents.com- 14% of the world adhere to this religion

These all stay within 1% of each other, crazy! They must be true!

Buddhism

Mr. Schick- 6%-20% of the world adhere to this religion
CIA World Fact Book- 7.1% of the world adhere to this religion
adherents.com- 6% of the world adhere to this religion

These numbers fluctuate a bit, but I assume the real percentage is the 6% to 7% range

Judaism

Mr. Schick- 2.1% of the world adhere to this religion
CIA World Fact Book- .2% of the world adhere to this religion
adherents.com- .22% of the world adhere to this religion

It looks to be that Judaism has about .2% of the worlds population adhered to its teachings and beliefs