Your estimate is accurate, if the rule of three is anything to go by.
As we said, it's not our role to obtain this information, but the figures match what we have been hearing from other law enforcement agencies. Generally speaking, only about 10% to 15% of victims complain.
As Mr. Harroun said, there are several reasons. The victims may be embarrassed or feel remorse, or perhaps have the impression that they'll never see that money again. That's why so many people don't complain. They decide to live with what happened to them, treat it as a lesson learned, and move on.