Suicide statistics are tricky. What you do or don't count as a death by suicide isn't always obvious. And there's a bunch of data that isn't always collected, or has only just started to be collected. (Was the person gay? Were they trans?)

When we look at work we think that jobs affected by economic downturn are risky (builders, vets, farmers). We also think that some other jobs are risky because they provide access to means and methods (doctors, vets, farmers).

There are some risk factors for programmers: young; single; male; intelligent enough to research methods;

For England there are these sources:

Office of National Statistics.

these numbers are robust, and good quality. They very clearly define what they do count as suicide and what they don't count. They also clearly define how they define the year - the year of registration, which may not be the year the death happened.

Searching for suicide returns a lot of information, some of which is provided under FOI request.

http://www.ons.gov.uk/ons/search/index.html?newquery=suicide

Suicides in the UK (2013 registrations) http://www.ons.gov.uk/ons/rel/subnational-health4/suicides-i...

Suicides in the UK (2012 registrations): http://www.ons.gov.uk/ons/rel/subnational-health4/suicides-i...

National Confidential Inquiry into Suicide and Homicide by People with Mental Illness

http://www.bbmh.manchester.ac.uk/cmhs/research/centreforsuic...

There's also information available from Public Health England.

http://fingertips.phe.org.uk/profile-group/mental-health/pro...

http://www.phoutcomes.info/public-health-outcomes-framework#...

EDIT: Here's the link to the CDC stuff: http://www.cdc.gov/violenceprevention/suicide/statistics/

http://www.cdc.gov/violenceprevention/suicide/definitions.ht...