Where do you find data on Canada's public relations industry?

Through the Canadian Council of Public Relations, I received an email from a university student in search of data about Canada’s public relations industry. She wrote:

I’m doing a term paper for one of my university courses and need to find information on the Canadian public relations industry facts such as market trends, demographics, economic, cultural and social factors.  This information is widely available for US market, however I cannot find anything on the Canadian market.
I would appreciate if you could let me know where I could find this type of information.

Good question. I have to be honest that I don’t have good sources for this information at my fingertips.

Do you have authoritative sources of information on Canada’s public relations industry that you rely upon?

(This is cross-posted at the CCPRF Weblog. I decided to cross post here because I know that more people read ProPR.ca. However, if you haven’t checked out the CCPRF Weblog lately, please try it again. I think that you’ll find more frequent posts from heads of Canada’s public relations consulting firms.)