query: What percentage of the US Hispanic population has South American origins?
passage: Demographics of Hispanic and Latino Americans
Over 60% of the Hispanic and Latino population in the United States is of Mexican ancestry. The influence of Mexican and Mexican-American culture is felt throughout the country, with the epicenter of this influence located in the southwestern United States, including Texas, Nevada, Arizona and Southern California.
passage: Demographics of Hispanic and Latino Americans
According to the U.S Census Bureau, Hispanics are among the least educated ethnic group. In 2000, about 530,000 Hispanics and Latinos 16–19 years of age were high school dropouts, yielding a dropout rate of 21.1 percent for all Hispanics and Latinos.[30]