By collective bargaining coverage
| State | Gap | Rate |
|---|---|---|
| AL | -1.5 | 64.2 |
| AK | 4.6 | 91.2 |
| AZ | 4.3 | 47.0 |
| AR | 0.0 | 28.4 |
| CA | -2.3 | 89.1 |
| CO | 6.2 | 66.8 |
| CT | -1.8 | 89.6 |
| DE | -.3 | 79.5 |
| DC | 5.3 | 68.0 |
| FL | -1.3 | 57.4 |
| GA | 2.7 | 31.3 |
| HI | 1.9 | 87.6 |
| ID | 5.3 | 57.0 |
| IL | 1.3 | 89.4 |
| IN | 3.7 | 80.5 |
| IA | -4.5 | 78.1 |
| KS | 8.6 | 69.6 |
| KY | .6 | 56.2 |
| LA | -1.7 | 35.4 |
| ME | -1.9 | 86.6 |
| MD | 4.9 | 81.7 |
| MA | 11.3 | 94.6 |
| MI | 2.1 | 91.9 |
| MN | 4.0 | 90.5 |
| MS | -1.5 | 29.8 |
| MO | 2.3 | 54.1 |
| MT | 6.7 | 85.5 |
| NE | 5.4 | 73.4 |
| NV | 3.9 | 70.0 |
| NH | 40.1 | 84.5 |
| NJ | 8.0 | 89.5 |
| NM | 3.7 | 55.4 |
| NY | 1.4 | 92.5 |
| NC | 2.0 | 23.8 |
| ND | 10.4 | 69.3 |
| OH | 11.1 | 85.7 |
| OK | .5 | 49.7 |
| OR | -.4 | 91.2 |
| PA | 11.7 | 91.1 |
| RI | -.6 | 92.4 |
| SC | -2.5 | 26.9 |
| SD | 7.0 | 43.5 |
| TN | .2 | 43.1 |
| TX | -1.8 | 41.2 |
| UT | 3.7 | 56.5 |
| VT | 3.3 | 87.6 |
| VA | .8 | 36.0 |
| WA | -.1 | 86.3 |
| WV | 2.1 | 65.2 |
| WI | 22.0 | 86.1 |
| WY | 2.2 | 42.6 |