I would actually be suprised if statistically it would be that much higher, if higher at all than other religions. I knew of only one witness that killed himself, a teenager distraught over the tragic death of two of his best friends in a car accident the week before.
I have known a few others that killed themselves, and they were not witnesses. I don;t know...I do know that the witnesses really need to develop some sort of REAL counseling system, with people that have actual training. They should require elders to get real training in these areas, and to have referrals over professionals ready at their fingertips to suggest people call upon when things are too deep for them. I think for a lot of people, support from the elders along with REAL professional counseling helps.
When I was having trouble several years ago, I decided to go to a counselor, and when I told my best JW friend she applauded me. It was a big mistake though, I picked one that really didn't listen well, and didn't help me that much at all...big nightmare...put me off on counseling for a long time..long story I don't feel comfotable talking about. Anyway, I did not go back to a regular therapist, but did meet with a few counselors here and there...people that were in the trenches every day with troubled people, and they gave me some good advice and encouragement that helped me figure out things along the way. During all of this I stayed a witness....it was after I got my head together that I realized things were not right in their teachings.
Again, I don't know...I think those statistics could be difficult to qualify. But it doesn't matter what those stats would be. I think we can all agree that the WTS needs to re think allowing unqualified elders to have the responsibilty of working with those that need professional help. They need to realize that the bible does not solve mental health issues. Sure, it can be used to help give people some encouragement. I read Nina's threads about her Dad...the elders surely could have prevented that tragic event by taking care of one of their own by simple kindness.