What is the percentage of the black population in america?

However, these numbers are somewhat suspect. As noted by ReligiousTolerance.org, "Church attendance data in the U.S. has been checked against actual values using two different techniques. The true figures show that only about 21% of Americans and 10% of Canadians actually go to church one or more times a week. Many Americans and Canadians tell pollsters that they have gone to church even though they have not. Whether this happens in other countries, with different cultures, is difficult to predict." An online poll in 2006 found that nearly half of Americans are uncertain God exists.