Not directly, no. Since 1959 cars are going faster, there is more of them, and the bar for driving one is lower because of ubiquity and social expectation. So

Not directly, no. Since 1959 cars are going faster, there is more of them, and the bar for driving one is lower because of ubiquity and social expectation. So it's about the same. Just more cars, and more people driving them, so we see more crashes. I'd say the percentages don't matter as much because of how many more cars and roads there are. Even if they'd be marginally lower -- you still get many, many more crashes and injuries.