Based on lifestyle, I wouldn't expect to see many Mediterraneans wear them. Eastern Europeans maybe a little, but not so much, unless they're trying to emulate Germans, which does happen.

My SO's parents took the whole family across Hungary when it was still communist with a 2-year-old on a front bike seat. Three bikes, four people, zero helmets.

Old habits die quite hard in the old world.

(Thankfully as the schnapps is quite good and the train service ... 200+mph with WiFi right now ... are top notch and I hope they don't change.)