assume a false distinctiveness of the parental populations, since human groups have exchanged mates from local to continental scales throughout history." Members of other races In the 2000 census, the non-standard category of "Other" was especially intended to capture responses such as Mestizo and Mulatto, two large multiracial groups in most of the countries of origin of Hispanic and Latino Americans. However, many other responses are captured by the category. In 2008, 15 million people, nearly five percent of the total U.S. population, were estimated to be "some other race", with 95% of them being Hispanic or Latino. Due to this category's non-standard status, statistics from government agencies other than the Census Bureau (for example: the Centers for Disease Control's data on vital statistics, or the FBI's crime statistics), but also the Bureau's own official Population Estimates, omit the "some other race" category and include most of the people in this group in the White population, thus including the vast majority (about 90%) of Hispanic and Latino Americans in the White population. For an example of this, see The World Factbook, published by the Central Intelligence Agency. Ancestry The ancestry of the people of the United States of America is widely varied and includes descendants of populations from around the world. In addition to its variation, the ancestry of people of the United States is also marked by varying amounts of intermarriage between ethnic and racial groups. While some Americans can trace their ancestry back to a single ethnic group or population in Europe, Africa, or Asia, these are often first, second and third-generation Americans. Generally, the degree of mixed heritage increases the longer people's ancestors have lived in the United States (see melting pot). There are several means available to discover the ancestry of the people living in the United States, including genealogy, genetics, oral and written history, and analysis of Federal Population Census schedules; in practice, only few of these have been used for a larger part of the population. 2020 American Community Survey According to the 2015–2020 American Community Survey, the thirty largest ancestry groups in the United States were (see above for the OMB self-designation options): However, demographers regard the reported number of English Americans as a serious undercount, as the index of inconsistency is high and many if not most Americans from English stock have a tendency to identify simply as "Americans" or if of