These are the top 10 summer movies from 1982 to 1989.

Only a quarter of them were sequels, including “Jaws 3-D,” “Rocky III,” “Return of the Jedi” and “Indiana Jones and the Temple of Doom.” (Movies are not shown in order of box office sales.)

Just 16 of the top 100 summer movies of the 1990s were sequels. But one of them grossed more on its opening weekend than any other summertime hit of the decade, after adjusting for inflation: “The Lost World,” the follow-up to “Jurassic Park.”

Sequels gained steam in the 2000s, making up 35 of the top 100 summer movies. And they accounted for the three biggest openings of the decade: “Pirates of the Caribbean: Dead Man’s Chest,” “Spider-Man 3” and “The Dark Knight.”

So far in the 2010s, sequels have made up more than half of the top summer blockbusters. In 2018, seven of the top 10 summer movies were sequels, and two of the three that were not (“The Meg” and “Crazy Rich Asians”) now have follow-ups planned.

The summers of the 2010s have been dominated by more sequels than any previous decade.

Counting movies that have led to sequels, or plans for sequels, more than half of the top summer movies of the last 37 years are now franchise films — movies that are part of a series.