Canadian Recording Industry Association
http://www.cria.ca/
(Sales & Units Shipped, Music Charts, Industry Employment etc.)

Sound Recording data is available at the Statistics Canada web site:
http://www.statcan.ca/english/Pgdb/cultur.htm#sou

Also see:

Canadian Independent Record Production Association:
http://www.cirpa.ca/

International Federation of the Phonographic Industry:
http://www.ifpi.org/home.html
Includes Music piracy statistics

Finally look at the Canadian Heritage report on the Future of Canadian Music:
http://www.pch.gc.ca/pc-ch/pubs/ic-ci_e.cfm