The figures released to The Associated Press offer a glimpse into what has long been an extremely difficult phenomenon to pin down — the frequency of sex abuse in Protestant congregations.

Religious groups and victims’ supporters have been keenly interested in the figure ever since the Roman Catholic sex abuse crisis hit five years ago. The church has revealed that there have been 13,000 credible accusations against Catholic clerics since 1950.

Protestant numbers have been harder to come by and are sketchier because the denominations are less centralized than the Catholic church; indeed, many congregations are independent, which makes reporting even more difficult.

Some of the only numbers come from three insurance companies — Church Mutual Insurance Co., GuideOne Insurance Co. and Brotherhood Mutual Insurance Co.

Together, they insure 165,495 churches and worship centers for liability against child sex abuse and other sexual misconduct, mostly Protestant congregations but a few other faiths as well. They also insure more than 5,500 religious schools, camps and other organizations.

The companies represent a large chunk of all U.S. Protestant churches. There are about 224,000 in the U.S., according to the Association of Statisticians of American Religious Bodies, although that number excludes most historically black denominations and some other groups, which account for several thousand congregations.