Wesley Health Care "The Future@Work Health Report" notes "The study estimated the effect on the Australian economy from lost productivity due to ill health was $34.8 billion per annum or 4.2% of GDP."
See also Fifteen Problems, Adverse Costs, Sick at work - The cost of presenteeism to your business, employees and the economy - May 2007 Medibank Private, Health Care Costs and Drug Abuse Caused Crime