The wages of health care professionals are low by international comparison. In 2009, as multiples of the average wage, the wages of GPs (1.4), specialists (1.6) and hospital nurses (0.8) were among the lowest in the OECD. The share of physicians aged over 55 was around 40% in 2009, well above the OECD average of around 30% (Figure 4.8). The OECD aggregate is an unweighted average of data for 27 OECD countries.