everything I have ever read and studied about suicide shows that many "suicides" choose methods that are likely to fail on purpose, because they want to be rescued.
Also, many more men than women use methods that are very unlikely to fail, like a bullet to the head, or jumping off high bridges/buildings. donl;t know if this is because men are more inherently aggresive in all things.
Japan has one of the highest suicide rates of any industrialized nation and their citizens are not allowed to own firearms either.
In 2009, over 30,000 people killed themselves in japan. 12th straight year of that many at least
"Common methods of suicide are jumping in front of trains, leaping off high places, hanging, or overdosing on medication"
the correlation with guns is very tentative.
The WHO (world heath organization) has numbers on this stuff.
http://www.who.int/mental_health/pre...iciderates/en/
shit is real bad in Lithuania, Belarus, Latvia, Slovenia...