What caught my eye was the 29.5% high of 1969 which is comparable to the highs of 2000 (30.9%) and 2007 (26.2%), all bull tops just before fast, severe declines.
Also the 13-yr long decline from '69 to a 73-yr low of only 8.4% (!) in '82. Inflation was sometimes higher & sometimes lower, but always there. Economic growth was sometimes better & sometimes worse. Precious metals & oil stocks did well & probably other segments