How many documented cases of juveniles being executed in America are there?

As of October 2023, there have been 22 documented cases of juveniles executed in the United States since the death penalty was reinstated in 1976. However, the U.S. Supreme Court ruled in 2005, in Roper v. Simmons, that executing individuals for crimes committed under the age of 18 is unconstitutional. This ruling effectively ended the practice of executing juveniles in the country.