In terms of the occupational projections, if you don't mind I'll quote Yogi Berra, who said “It is difficult to make predictions, especially about the future”.
The challenge here is exactly what you mentioned. The number of seats in the faculty of medicine is controlled. The number of jobs available is controlled. Immigration, in some ways, is controlled.
You can make projections at the national level in the short term about how many physicians there will be five years from now, but to make long-term projections is very difficult.
It's the same thing with nurses. It depends how many seats are available. I don't think there's a shortage of people applying for nursing and medicine. There are the issues about how many seats are open.
In terms of data, CIHI has data about the supply. Provinces are working...and each province has its model for doing its health human resources planning. They're trying to focus on needs, but it's very difficult to do. Health human resources need planning because the scope of practice varies, depending on the needs of your population.
Interprovincial migration also plays a role. In Canada, we have observed in the last 30 years that places that have rapid economic growth effectively see an increase in their population and an increase in their health professionals, even though they may not have trained more of them than they have in the past.
In terms of the information, I think CIHI could probably do something regarding health human resources projections, but you have to take into account that those projections can only be short term if you want them to be relatively reliable because they are determined by policy more than natural phenomena or the market.