Slavic Deficiency in Metal, Rock and Punk

As I was going over the list of the ethnicities that dominate rock, metal, and punk music, I found that there were very few people of eastern european decent (except the Polish). I don't know if it's because the culture doesn't value music, or if there aren't that many people with that ethnic background that is the cause for this. And this is mostly for well-known people in the mentioned genres.