Punk/ Metal accidental. sounds like they OD alot.
Hiphop gun violence, no surprise. Could be inflated slighty though, because alot of those dudes are full time mcdonalds employees that dropped one mixtape. 1 out of 2 rap superstars on the level of somebody like Kendrick or drake aren't getting murdered. If you don't have a real commercial single out and have only released mixtapes i don't consider that your full profession yet.. Lots of people play musical instruments, if they get murdered nobody says local rockstar murdered. No, its local mechanic who played in a band with his friends as a hobby was murdered. I seriously doubt 51% of charting rappers have been shot to death.
Rest of them heart and cancer just means the live longer and die of old head issues.