Car and Driver had a little throwaway listicle* entitled "The Best-Selling Car in America the Year You Graduated High School: Find the top-selling car from each year, from 1978 to today."
Spoiler Alert: If you're a late Boomer or early Gen X'er, it's probably an Oldsmobile Cutlass. For most Gen X'ers, it's the Taurus or Accord, and then it's Camrys from there on out. (There's a jumbled period in the mid-'80s where Cutlass dominance had crumbled and a few forgettable GM and Ford products scrambled for first place; horrid little commuter boxes like the Escort and Cavalier. My graduating year featured the Chevy Celebrity, the most vanilla variant of GM's spectacularly mediocre '80s A-body. Imagine a car so dull that the Lumina was an edgy improvement.)
*Safari's spellchecker knows "listicle". Huh.