http://mormonism-unveiled.blogspot.com/2012/01/elder-marlin-k-jensen-confirms-mormon.html
"Elder Jensen, who WAS also the official Church Historian, did not provide any specific figures on the rate of attrition. Furthermore, although Elder Jensen also did not provide a demographic breakdown, the Church is particularly concerned about its younger members, who are considered future missionaries; it has been said that attrition is greater amongst young people. Census data from some foreign countries show that the retention rate for their converts is as low as 25 percent. In the U.S., only about half of Mormons are active members of the church, according to Washington State University emeritus sociologist Armand Mauss, a leading researcher on Mormons. Sociologists estimate that out of the 14 million Mormons worldwide, only about 5 million are active. The LDS Church has not officially commented on the Reuters article yet."
Jensen has been taken to the woodshed whether he or any other TBM will admit it.
Telling the truth in Mormonism can get you fired.