The Los Angeles Times released nearly 5,000 records of allegations from the Boy Scouts of America as a browseable map and searchable list. You can also download the data.
This database contains information on about 5,000 men and a handful of women who were expelled from the Boy Scouts of America between 1947 and January 2005 on suspicion of sexual abuse. The dots on the map indicate the location of troops connected in some way to the accused. The timeline below shows the volume of cases opened by year; however, an unknown number of files were purged by the Scouts prior to the early 1990s
The interactive map helps you narrow down by city, but it's kind of hard to see cases on a country-wide perspective. Here's a quick look.
The worst part is that a lot of the cases went unreported.