Sub-Saharan African admixture and 3.2% Native American admixture. The same author, in another study, claimed that about 30% of all White Americans, approximately 66 million people, have a median of 2.3% of Black African admixture. Shriver discovered his ancestry is 10 percent African, and Shriver's partner in DNA Print Genomics, J.T. Frudacas, contradicted him two years later stating "Five percent of European Americans exhibit some detectable level of African ancestry." Older studies have also been performed. In a 2007 study, Gonçalves et al. reported Sub-Saharan and Amerindian mtDNA lineages at a frequency of 3.1% (respectively 0.9% and 2.2%) in a sample of 1387 American Caucasians as compared to 62% in white Brazilians (respectively 29% and 33%), 98% for white Colombians (respectively 8% and 90%) and similarly high levels for Argentines, Chileans, and Costa Ricans. A 2003 study on Y-chromosomes and mtDNA found African admixture in European-Americans to be "below the limits of detection". Admixture in Hispanic whites In contrast to non-Hispanic or Latino whites, whose average European ancestry is 98.6%, genetic research has found that the average European admixture among White Hispanic and Latino Americans is 73%, while the average European admixture for Hispanic Americans overall (regardless of their self-identified race) is 65.1%. See also American ancestry Anglo Emigration from Europe European Americans Hyphenated American Middle Eastern Americans Non-Hispanic or Latino whites Race and ethnicity in the United States Stereotypes of white Americans White Anglo-Saxon Protestant White ethnic White Latino Americans White Southerners List of United States cities by percentage of white population White Americans in California Notes References External links White Population 2000 from the US Census Ethnic groups in the United States