I drive a Scion xB, which has the aerodynamic efficiency of a toaster. When I bought it in 2005, the huge amount of bugs that the windshield caught was one of the few things I didn't like about the car.

I'd estimate conservatively that during the past few summers, driving in the same areas, I see at least one third fewer splats than I did a decade ago. However, the area I live in has also had a big growth in sprawl, with lots of new housing developments especially, and that is almost certainly a factor.