7 times sounds atypical; perhaps by changing your driving behavior you could reduce your risk. You might try decelerating slowly, keeping 2-4 seconds of following distance, checking your rear-view while braking, and leaving extra space in front of your vehicle at a stop--moving forward as cars come in behind.
you should try racing (real-race-track variety racing) with something expendable, you'll learn to remember there might be people behind you very quickly.
(My GF says I drive too fast and stop too quickly. She's probably right, although 3 of those times I was moving at less than walking speed.)