Puerto Rican citizenship
A 1918 official report from the American colonial governor of Puerto Rico to the U.S. Secretary of War, this one after the Jones Act of 1917, had become law, states that the "passports...[are used to] prove a person's nationality," thus making clear that Puerto Rican citizenship and Puerto Rican nationality were one and the same. The United States government also recognizes this status in its own records. For example, the CIA World Fact Book, states that the nationality of Puerto Ricans is not "American" but, in fact, ""Puerto Rican"." The Spanish Government also recognizes Puerto Ricans as a people with Puerto Rican, "and not American," citizenship. It also provides Puerto Rican citizens privileges not provided to citizens of several other nations, such as Haití, Jamaica, Trinidad y Tobago y Guyana. Since 2007, the Government of Puerto Rico has been issuing "Certificates of Puerto Rican Citizenship" to anyone born in Puerto Rico or born outside of Puerto Rico with at least one parent who was born in Puerto Rico.
Afro-Latin Americans
According to the 2010 U.S. Census taken in Puerto Rico, 75.8% of Puerto Ricans identified as being white, 12.4% of the population as being black or African American and 11.1% as mixed or of another ethnicity. An island-wide mitochondrial DNA (mtDNA) study conducted by the University of Puerto Rico at Mayagüez revealed that 61% of Puerto Ricans have maternal Native American ancestry, 26.4% have maternal West or Central African ancestry, and 12.6% have maternal European ancestry. On the other hand, the Y chromosome evidence showed Puerto Ricans' patrilineage to be approximately 75% European, 20% African, and less than 5% indigenous.