I just think the figures must be staggering for such a small group of people.
You underestimate just how much children are abused in society as a whole. There is a staggering amount of abuse and abusers everywhere in society. Incidence within JW may or may not be slightly higher than average, we don't know.
Right now your perception is likely skewed because you notice and remember all the JW cases but not the others...
Research in North America has concluded that approximately 15% to 25% of women and 5% to 15% of men were sexually abused when they were children