Safe withdrawal rates at AAII
The American Association of Individual Investors (AAII) posted a study of safe withdrawal rates a while back. They use the same methodology as FIRECalc, but only go back to either 1926 or 1945 (both are reported).
The results are not materially different than FIRECalc or Intercst's spreadsheets produce, but the presentation is tabular, and the discussion is a bit more technical.
Most of their stuff requires membership, but this article is free.
Often uninformed, seldom undecided.
Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. Mark Twain