| 2001 | 2005 | 2009 | 2013 | 2017 | 2018 | 2019 | 2020 | 2021 | |
| Black/African American | 16.9 | 17 | 16.9 | 17 | 17.1 | 16.9 | 16.8 | 16.7 | 16.3 |
| American Indian/Alaska Native | 18.8 | 18.7 | 18.9 | 18 | 17.5 | 17.3 | 17.0 | 16.7 | 16.9 |
| White | 21.8 | 21.9 | 22.2 | 22.1 | 22.4 | 22.2 | 22.1 | 22.0 | 21.7 |
| Hispanic/Latino | 18.5 | 18.4 | 18.7 | 18.8 | 18.9 | 18.8 | 18.7 | 18.5 | 18.3 |
| Asian | 21.7* | 22.1* | 23.2* | 23.6 | 24.3 | 24.5 | 24.6 | 24.9 | 24.9 |
| Pacific Islander | — | — | — | 19.4 | 18.4** | 18.2 | 17.9 | 17.5 | 17.2 |
| Two or More Races | — | — | — | 21.1 | 21.2 | 21.1 | 21.0 | 20.9 | 20.6 |
| No Responses | — | — | — | 20.8 | 20.3 | 19.8 | 19.7 | 19.7 | 19.2 |