Years 1990-91 to 1999-00 taken from Report on Government Services 2001 (fig 6.3). Years 2000-01 to 2007-08 calculated using ABS (Cat. 3101.4) and MBS GP Workforce Statistics data. Years 2009-09 to 2012-2013 taken from Report on Government Services 2014 (fig 11.3).