| 1 | NORTH DAKOTA | 2.0 |
| 1 | SOUTH DAKOTA | 2.0 |
| 3 | VERMONT | 2.1 |
| 4 | NEBRASKA | 2.5 |
| 4 | NEW HAMPSHIRE | 2.5 |
| 6 | MARYLAND | 2.7 |
| 6 | VIRGINIA | 2.7 |
| 8 | IOWA | 2.8 |
| 8 | MINNESOTA | 2.8 |
| 8 | MISSISSIPPI | 2.8 |
| 11 | KANSAS | 2.9 |
| 11 | UTAH | 2.9 |
| 11 | WISCONSIN | 2.9 |
| 11 | WYOMING | 2.9 |
| 15 | ALABAMA | 3.0 |
| 15 | HAWAII | 3.0 |
| 15 | MAINE | 3.0 |
| 15 | MASSACHUSETTS | 3.0 |
| 15 | TENNESSEE | 3.0 |
| 20 | MONTANA | 3.1 |
| 21 | GEORGIA | 3.2 |
| 22 | FLORIDA | 3.3 |
| 22 | IDAHO | 3.3 |
| 24 | ARIZONA | 3.4 |
| 24 | ARKANSAS | 3.4 |
| 24 | PENNSYLVANIA | 3.4 |
| 24 | SOUTH CAROLINA | 3.4 |
| 28 | MISSOURI | 3.5 |
| 28 | OKLAHOMA | 3.5 |
| 30 | NORTH CAROLINA | 3.6 |
| 31 | INDIANA | 3.7 |
| 32 | COLORADO | 3.8 |
| 32 | NEW MEXICO | 3.8 |
| 34 | DELAWARE | 3.9 |
| 34 | MICHIGAN | 3.9 |
| 36 | TEXAS | 4.0 |
| 37 | LOUISIANA | 4.1 |
| 38 | NEW YORK | 4.2 |
| 38 | OHIO | 4.2 |
| 38 | OREGON | 4.2 |
| 38 | WEST VIRGINIA | 4.2 |
| 42 | CONNECTICUT | 4.3 |
| 42 | RHODE ISLAND | 4.3 |
| 44 | ALASKA | 4.5 |
| 45 | KENTUCKY | 4.6 |
| 45 | NEW JERSEY | 4.6 |
| 47 | ILLINOIS | 4.9 |
| 47 | WASHINGTON | 4.9 |
| 49 | NEVADA | 5.1 |
| 50 | CALIFORNIA | 5.2 |
| 51 | DISTRICT OF COLUMBIA | 5.3 |