According to data from the January–September 2015 National Health Interview Survey,

...  after adjusting for age and sex, the percentage of persons without health insurance coverage by race/ethnicity was:

• 19.5% for Hispanic persons
• 6.3% for non-Hispanic white persons
• 10.0% for non-Hispanic black persons

Source: "Early Release of Selected Estimates Based on Data From the January–September 2015 National Health Interview Survey," National Center for Health Statistics, Centers for Disease Control and Prevention, February 2016, http://www.cdc.gov/nchs/data/nhis/earlyrelease/earlyrelease201602.pdf