Sorry, but those numbers don't take over a year to compile
Your argument is just plain wrong. Yes, the numbers do take a few months to compile and yes, there can be revisions over the next few months. However, the numbers showed the economy had turned around early in 1991, so why were they letting Clinton get away with his "Worst economy in 50 years" lie in 1992? Why didn't a single major newspaper or TV network challenge him with the facts? I see no other explaination that either bias, laziness, or sheer stupidity on the Press's reporting.