Sure but you can get up to 98% or so. When I attempted suicide, I was absolutely certain that I needed to die. But then I apparently made a lot of noise so I was taken to the hospital so that failed. But anyway, I feel like if you're having second thoughts, it's not your time yet. Plus, it's not like you can un-kill yourself - dying is a decision you can't really come back so you should, at least in my opinion, be very sure about it if you're doing it.