support for allowing parallel private financing. The history of Canadian physicians in the development of Medicare has been described by C. David Naylor. In 1991, the Ontario Medical Association agreed to become a province-wide closed shop, making the OMA union a monopoly. Critics argue that this measure has restricted the supply of doctors to guarantee its members' incomes. In 2008, the Ontario Medical Association and the Ontario government agreed to a four-year contract with a 12.25% doctors' pay raise, which was expected to cost Ontarians an extra $1 billion. Ontario's then-premier Dalton McGuinty said, "One of the things that we've got to do, of course, is ensure that we're competitive ... to attract and keep doctors here in Ontario ..." Healthcare spending and an aging population By 2019, Canada's aging population represented a modest increase in healthcare costs of about 1% a year. It is also the greatest at the extremes of age at a cost of $17,469 per capita in those older than 80 and $8,239 for those less than 1 year old in comparison to $3,809 for those between 1 and 64 years old in 2007. Comparing healthcare spending over time Healthcare spending in Canada (in 1997 dollars) has increased each year between 1975 and 2009, from $39.7 billion to $137.3 billion, or per capita spending from $1,715 to $4089. In 2013 the total reached $211 billion, averaging $5,988 per person. Figures in National Health Expenditure Trends, 1975 to 2012, show that the pace of growth is slowing. Modest economic growth and budgetary deficits are having a moderating effect. For the third straight year, growth in healthcare spending will be less than that in the overall economy. The proportion of Canada's gross domestic product will reach 11.6% in 2012 down from 11.7% in 2011 and the all-time high of 11.9% in 2010. Total spending in 2007 was equivalent to 10.1% of the gross domestic product which was slightly above the average for OECD countries, and below the 16.0% of GDP spent in the United States. Since 1999, 70% of Canada's total health expenditures is from the public sector and 30% from the private sector. This was slightly below the OECD average of public health spending in 2009. Public sector funding included most hospital and physician costs with the other 30% primarily paid by individuals through their private or workplace insurance or out-of-pocket. Half of private health expenditure comes