An industry report in IBIS World contains several segments that could help with estimating future performance of an industry:
Example of an IBIS World industry report.
Secondary sources:
We have a couple online sourced that provide ratios, but they are limited in the number of companies they follow and/or the type of ratios they provide. However, if you are in those databases already, it may be simple to pull the ratios directly from them.
When you do an industry search, and display the results, ratios are listed under the tab to the far right, "Key Statistics." Please provide feedback on whether this database was useful to you or not..
These resources cover background on industries or companies from a risk analysis perspective.
These books provide background on understanding and using ratio analysis.
The full list of books about ratio analysis and financial statements. Below are the "classics" and highlighted materials: