| Year |
Data Not Available |
< 75% |
75–84% |
85–94% |
≥95% |
| 2001 |
5
(District of Columbia, Florida, Iowa, Oklahoma, South Dakota) |
18
(Alaska, California, Indiana, Louisiana, Maryland, Minnesota, Missouri, Nebraska, Nevada, New Hampshire, New Jersey, North Dakota, Ohio, Pennsylvania, Rhode Island, Tennessee, Vermont, Washington)
|
6
(Georgia, Idaho, Maine, Michigan, Montana, New York) |
10
(Alabama, Arizona, Colorado, Connecticut, Kansas, Kentucky, New Mexico, Oregon, West Virginia, Wisconsin) |
12
(Arkansas, Delaware, Hawaii, Illinois, Massachusetts, Mississippi, North Carolina, South Carolina, Texas, Utah, Virginia, Wyoming) |
| 2003 |
2
(Arizona, Iowa) |
2
(California, Ohio) |
3
(Alaska, Delaware, Washington) |
13
(Idaho, South Dakota, Minnesota, Wisconsin, Michigan, New York, New Hampshire, Vermont, Maine, Maryland, New Mexico, Arkansas, Louisiana) |
31
(Alabama, Colorado, Connecticut, District of Columbia, Florida, Georgia, Hawaii, Illinois, Indiana, Kansas, Kentucky, Massachusetts, Mississippi, Missouri, Montana, Nebraska, Nevada, New Jersey, North Carolina, North Dakota, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah, Virginia, West Virginia, Wyoming)
|
| 2005 |
5
(Delaware, District of Columbia, Kansas, Montana, Nevada) |
2
(California, Tennessee) |
3
(Arizona, Minnesota, New Mexico) |
7
(Alaska, Florida, Maine, Ohio, Oklahoma, Texas, Wisconsin) |
34
(Alabama, Arkansas, Colorado, Connecticut, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Utah, Vermont, Virginia, Washington, West Virginia, Wyoming)
|
| 2007 |
3
(Alabama, Delaware, District of Columbia, Georgia, New Mexico) |
0
|
1
(California) |
6
(Alaska, Idaho, Minnesota, Ohio, Tennessee, West Virginia) |
39
(Arizona, Arkansas, Colorado, Connecticut, Florida, Hawaii, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mississippi, Missouri, Nebraska, Nevada, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Texas, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming)
|