Seems high to me. Similar to another commenter, I'm in my 30s and I think I've only been to 3 - both grandmothers and maybe a cousin. But I only remember one, and I don't remember which of them it was for.

For us it was only normal to go to funerals for family members, and my parents' generation is getting up there but still alive. So only your four grandparents are what you'd usually expect by that age.

I never even heard about deaths in friends' families unless it was a reason they were missing school.