Here are some keywords that may be helpful in searching vocational databases. Try using different combinations and ask a librarian for help with your search strategy.
Published by the US government, the Occupational Outlook Handbook describes various careers and occupations and provides statistically information and predictions for future job feasibility.
O*NET (The Occupational Information Network) is a free database developed for the U.S. Department of Labor, offering free analysis of skills necessary for specific career fields.