"Over the past decade, the unchurched population has remained stable at one third of the American population, the latest Barna Group survey showed.
The Barna study found that 33 percent of adults are classified as unchurched – people who have not attended a religious service of any type during the past six months. The statistic has remained relatively the same since 1994 when 36 percent were reported to be unchurched.
Some people groups are notorious church avoiders, the study found."
Christian Post, Tue, Mar. 20 2007