Your searches will yield a lot of raw data in terms of personal names, case names and legal documents that you will need to use your own judgement when analyzing. (law.stackexchange.com)
Note: Data for individual carriers in unavailable quarters may still available in raw data format below although data for the entire group could be incomplete. (transportation.gov)
You can also download raw data for the complete [1959 — 2011] period, that you can then easily display / analyze with your own software. (judithcurry.com)