There's no evidence it's lower. If anything I'd expect it to be higher, because at bottom, Christianity IS a suicide cult. They had to cobble on the suicide taboo to counter that.

Think about it: life is a veil of tears and justice and closure and comprehensibility are only certain in the afterlife. So why screw around here -- why not go straight to heaven right now? Get yourself a 30 ought six and bypass all this suffering (as well as prove your faith!). That's what Christianity would be without the suicide taboo.

Probably 80 % of suicides have to do with religion.

Ever since Durkheim's study on suicide, it has been known that religion actually increases the likelihood of suicide.