I have no hard data either, but I read about 6 bios, all the guys from the great past. I do not know how Ozzy, Steven Tyler, Joe Perry, Ace Frehley, Peter Chris, Slash, Nicki Sixx, Tommy Lee, and all the others I can not remember are still on this earth!
I think lots of the present crop have learned a little from the past. Yes, many still like to get their drink on and probably like to chill with some wild wood flower, but they have seen the Heroin travistys, though a few still seem to fall to that, and are doing all right getting off on the music and the attention. Heck! just give me 30,000 people in front of me. NOW THATS A DRUG ALL BY ITS SELF! As Bobby Doll (Poisons bass player) Says "Playing in front of 30.000 fans.... Its better than sex."
“Find your own sound. Dont be a second rateYngwie Malmsteen be a first rate you”
– George Lynch 2013 (Dokken, Lynchmob, KXM, Tooth & Nail etc....)