Its an interesting area - ONS doesn't compile that data (maybe it should; it'd be a wake up call if there was a big difference!). The Treasury and
GAD makes general assumptions - more's the pity. It would make financial planning a little clearer if there were some slightly former assumptions to rely on.
In the UK potential recruits, tend to be attracted to specific services rather than the military as a whole ('Be the best', 'Rise above the rest' etc). The army has also relied heavily on the 'It takes a soldier to recruit a soldier' so if there
was a problem with the collective mindset in the first place that resulted in problems with resettlement, then all that was happening was that it was simply being repeated over and over, instead of the army looking into social pastures new.
Even within the nilitary there are niche mindsets. RAF research found that barriers to joining it included misconceptions and concerns about qualifications, career options, training provided, discipline, disruption to family life and the belief that you are cut off from civilian life. However, the main reasons found for young people not wanting to join the Army were (unsurprisingly!) being killed and badly injured, being away from home at a young age, being bullied and having to follow orders.
A little knowledge is a dangerous thing but if we assume that emotional transition is hard and starts the chain of poor readjustment which leads to depression which can lead to premature death, these Q reports make for worrying reading. I remember reading that cancer through a higher incidence of smoking and heavier drinking was to blame. Op Grapple and Porton Down trials won't have helped mind and everytime we fired the main armament in the Scorpion battoned down and without air filtration running, it must have been like smoking 40 Super Strength.
Defence Analytical Services and Advice: UK Armed Forces Quarterly Mental Health Report