I did find this on the CA DOSH site- might be something you already saw.
But might point to another search area to look for info data/stats..

Probably won't find many stats on actual TOS -but maybe under CTD {cumulative trauma disease}, MSD {musculoskeletal disorder} or RSI {repetitive strain injury}.


[Injury & Illness Records

Injury and illness record keeping requirements under Cal/OSHA require a minimum amount of paperwork.

These records give you one measure for evaluating the success of your safety and health activities: success would generally mean a reduction or elimination of employee injuries or illnesses during a calendar year.

Five important steps are required by the Cal/ OSHA recordkeeping system:

1. Each employer (unless exempt by size or industry) must record each fatality, injury, or illness that is work-related, is a new case, or meets one or more of the general recording criteria specified in Title 8, Section 14300.
2. Record each injury or illness on the Cal/ OSHA Log of Occupational Work Related Injuries and Illnesses (Form 300) according to its instructions.
3. Prepare an Injury and Illness Incident Report (Form 301), or equivalent.
4. Annually review and certify the Cal/OSHA Form 300 and post the Summary of Work-Related Injuries and Illnesses (Form 300A) no later than February 1 and keep it posted where employees can see it until April 30.
5. Maintain the last five years of these records in your files.


NOTE: Additional information on recordkeeping can be found on the Internet at: www.californiaosha.info or www.dir.ca.gov/DOSH

During the year, regularly review these records to see where your injuries and illnesses are occurring. Look for any patterns or repeat situations. These records can help you identify hazardous areas in your work-place and pinpoint where immediate corrective action is needed.

Since the basic Cal/OSHA records are for reportable injuries and illnesses only, you might expand your system to include all incidents relating to workplace safety and health, even those where no injury or illness resulted. Such information can assist you in pinpointing unsafe acts, conditions or procedures.]
http://www.dir.ca.gov/dosh/dosh_publ...ns/IIPP.html#2