In 1958, it was estimated that approximately 74% of Cubans were of European ancestry, mainly of Spanish origin, 10% of African ancestry, 15% of both African and European ancestry (mulattos), and a small 1% of the population was Asian, predominantly Chinese. However, after the Cuban revolution, due to a combination of factors, mainly mass exodus to Miami, United States, a drastic decrease in immigration, and interracial reproduction, Cuba's demography has changed. As a result, those of complete European ancestry and those of pure African ancestry have decreased, the mulatto population has increased, and the Asian population has, for all intents and purposes, disappeared.