Is that due to the much higher success(?) rate among males vs females? What are the "attempts" per 100,000?

Statistically, females are more likely to self-harm in non-lethal ways. This acts as suicide prevention, in a way, since it triggers responses from the environment and reduces the likelihood of worst outcomes.

Males don't self-harm and overall don't signal their discomfort until it's too late.

According to this web site (accuracy unknown), women attempt suicide at a rate 3x that of men:

http://www.suicide.org/suicide-statistics.html

This PDF says that there are 25 attempts for every suicide:

http://www.cdc.gov/ViolencePrevention/pdf/Suicide_DataSheet-...

I had no idea it was that high!