getting older means pricier insurance... who knew?

Was chatting with my uncle yesterday, and he casually mentioned how his car insurance jumped up quite a bit after he turned 65. I mean, I always knew younger drivers paid more (been there, done that), but didn't realize it swings back around when you're older too. Kinda makes sense, I guess, but still caught me off guard. Wondering if anyone else noticed this or knows why exactly it happens?