| 2015 | 2016 | 2017 | 2018 | 2019 |
| Androscoggin | Androscoggin | Androscoggin | Androscoggin | Androscoggin |
| Aroostook | Aroostook | Aroostook | Aroostook | Aroostook |
| Cumberland | Cumberland | Cumberland | Cumberland | Cumberland |
| Franklin | Franklin | Franklin | Franklin | Franklin |
| Hancock | Hancock | Hancock | Hancock | Hancock |
| Kennebec | Kennebec | Kennebec | Kennebec | Kennebec |
| Knox | Knox | Knox | Knox | Knox |
| Lincoln | Lincoln | Lincoln | Lincoln | Lincoln |
| Oxford | Oxford | Oxford | Oxford | Oxford |
| Penobscot | Penobscot | Penobscot | Penobscot | Penobscot |
| Piscataquis | Piscataquis | Piscataquis | Piscataquis | Piscataquis |
| Sagadahoc | Sagadahoc | Sagadahoc | Sagadahoc | Sagadahoc |
| Somerset | Somerset | Somerset | Somerset | Somerset |
| Waldo | Waldo | Waldo | Waldo | Waldo |
| Washington | Washington | Washington | Washington | Washington |
| York | York | York | York | York |