| Geopolitical zones | 5 - 10 Years | 11 - 20 Years | 21 - 30 Years | 31 - 40 Years | Above 40 Years | Number |
| Northcentral | 2.0% | 14.0% | 32.0% | 26.0% | 26.0% | 50 |
| Northeast | 14.6% | 20.8% | 27.1% | 25.0% | 12.5% | 48 |
| Northwest | 8.5% | 19.1% | 27.7% | 19.1% | 25.5% | 47 |
| Southeast | 6.0% | 18.0% | 16.0% | 26.0% | 34.0% | 50 |
| Southsouth | 4.8% | 16.7% | 31.0% | 23.8% | 23.8% | 42 |
| Southwest | 14.0% | 36.0% | 24.0% | 12.0% | 14.0% | 50 |
| Total | 8.4% | 20.9% | 26.1% | 22.0% | 22.6% | 287 |