Ask the following questions:
Trade and industry associations can be excellent sources for facts, statistics, reports and contacts to speak with about an industry. Often, but not always, their data and reports are freely available on their websites.
Trade journals are good sources for identifying industry trends. Search using the industry name(s) or North American Industrial Classification System (NAICS) code and combine it with subjects and/or keywords such as "trends" or "surveys" or "outlook."