Throughout the United States there are over 1,000 health centers that operate approximately 6,000 sites. In 2010, the health centers served an estimated 20 million patients. The data collected via the Uniform Data System (UDS) reports that of those patients served, 62 percent were members of a racial or ethnic minority (predominantly Hispanic), 93 percent lived at or below 200 percent of the federal poverty level, 72 percent lived at or below 100 percent of the federal poverty level, and 38 percent were uninsured. In particular, during 2010 health centers served 862,775 migrant and seasonal farm workers and their families; more than 1 million individuals experiencing homelessness; and 172,731 residents of public housing.