Where available, outcome data show that all ATAPS services are producing significant clinical improvement for consumers. Update on the achievements of Tier 1 and Tier 2 ATAPS”, Centre for Health Policy, Programs and Economics, available at iuiuio.ataps-mds.com, accessed 4 September 2013. Evidence from Australia, for example, suggests that 64% of people experience their first episode of mental illness before turning 21, and 25% before the age of 12.