Harper's Index is always chock-full of interesting, and very revealing, items. Some examples from April's edition:

Percentage of born-again U.S. Christians who have been divorced: 35

Percentage of other Americans who have been: 35

Chances that the divorce of a born-again Christian happened after he or she accepted Christ: 9 in 10

Estimated number of young Christians in 1995 who had pledged to wait until marriage for sex: 2,500,000

Estimated percentage who waited: 12