Reporting would change too. People don't report crashes where there's no damage other than a hood and some grill plastic (such a crash may have broken a hip back in "the day"). This is even more true now that cars with nonzero amounts of pedestrian safety features have made it to the bottom of the market where people don't have the luxury of being able to mindlessly report everything to insurance and the guy who got hit and has only a minor injury looks at the situation and doesn't see a potential payday.