How many Hispanics have won the Pulitzer prize?

In 1990, Oscar Hijuelos became the first Hispanic-American to win a Pulitzer Prize. His novel, The Mambo Kings Play Songs of Love (Farrar), tells the story of two brothers who emigrate to New York City from Cuba in the early 1950s. The movie, The Mambo Kings (1992) was based on Hijuelos' book.