50 million

Number of uninsured people in the United States in 2011

20

Percentage of those uninsured in the United States who are undocumented immigrants

32

Percentage of undocumented adults in Los Angeles County who have never had a check-up, according to one study

17

Percentage of undocumented adults in Los Angeles County who have never seen a doctor

3.2

Percentage of U.S. population made up of undocumented adult immigrants

1.5

Percentage of U.S. medical costs accounted for by undocumented adult immigrants

3:1

Ratio of emergency department expenditures for uninsured undocumented children to those for uninsured U.S. born children

Sources: New England Journal of Medicine, Kaiser Commission on Medicaid and Uninsured, CNN