Keyword Search for documents held on Canadian Federal, Provincial & Territorial Government websites:
Statistics Canada resources can be explored by subject via their website:
Innovation, Science and Economic Development Canada: Industry by sector, statistics, and more.
See especially the Research and Business Intelligence section
Industry associations and trade groups are an excellent source of industry information. Some make industry statistics and reports available on their websites.
To identify industry associations, try an article database search, using terms like "industry association," "industry group," "trade group," "trade organization," etc.