permanent part time permanent full time permanent maximum term contract part time maximum term contract casual Staff by type of employment Workers compensation premium cost as a % of wages 2013–14 2014–15 2015–16 2016–17 2017–18 2.2% 1.7% 1.9% 2.5% 2.2% 2013–14 2014–15 2015–16 2016–17 2017–18 Staff turnover 20.4% 18% 20% 19.7% 25.9%