State Courts' Reversal Rates in the Supreme Court:

An interesting question came up: There's plenty of data on the U.S. Supreme Court reversal rates for the federal circuit courts (the Ninth Circuit is often listed as one of the most reversed, though other circuits have pretty high reversal rates, too), but is there some such data for cases coming out of state courts as well? Obviously, it would have to span several years to be even marginally meaningful, and even then it's not clear how meaningful the results would be. Still, it would be interesting data to look at; can anyone point me to some such dataset? Thanks!