Statistics about suicide are difficult to collate, and may be inaccurate because of the sensitivity of the issue, particularly in countries where suicide is an absolute taboo. You can find suicide statistics on the following sites:
International Statistics: World Health Organisation – for international suicide statistics, including the most recent global stats by country.
The Lancet.Com – The Lancet – for international suicide articles
USA Statistics: American Association of Suicidology
New Zealand Statistics: Suicide Prevention in New Zealand
Australian Statistics: Living is for Everyone
Canadian Statistics: Canada Statistics Agency
UK Statistics: Samaritans UK provides statistics for the United Kingdom and the Republic of Ireland.
Mind – useful fact sheets on suicide statistics
Office for National Statistics – trends in suicide rates