Do not settle on a single topic right away. Explore the resources with a few different topics in mind.
The most difficult data to find will probably be the "trend" data (for a line graph.) Try locating that information first. If you cannot satisfy that requirement, consider change or modify your topic.
Here are some keywords that you might find useful when trying to locate information via a search engine:
statistics, almanac, facts, fact sheet, trend, yearly, quarterly, annual, annual report, survey, poll, organization(s), association(s), records, union(s)
SEARCH ENGINE TIPS
Boolean Operators - AND, OR, NOT (in Google, AND is implied; OR can be used; and NOT is represented as a minus - sign), and "QUOTATION MARKS" (Phrase search.)
Sample Search String: thor "opening day" sales -"the dark world"
A USEFUL DATABASE
Search for specific companies for sales figures, employee trends, comparison charts of different companies, and information without specific industries.