I'm assuming you mean with regards to claims. Too many variables to consider. Depends on the carrier, number of claims experience and amount paid out, amount of premium received, hard/soft market, etc.
I suspect this information can be obtained from the state insurance departments. Companies submit extensive annual reports and I am sure claims vs. premiums would be part of this. Also, this information may be in the Companies' Annual Rports to stockholders.
Most companies pay out more than half of its revenues in claims. Claims are the biggest expense for an insurance company. There are several ratios that are used to gauge the profitability of an insurance company. An insurance adjuster, particularly an independent insurance adjuster, has a surprising amount of power to wield. Read here