What percentage of American's attend church each week? 50%? 33%?
JT at Between Two Worlds is linking to estimates that American church attendance is only around 20% even though about 40% of the public will claim they went to church on the previous weekend.
He also posts some information from Dave Olson which includes this rather frightening statistic:
If the present trends continue, the percentage of the population that attends church in 2050 will be almost half of what it is today.