| Result | 111th Congress | 112th Congress | 113th Congress | 114th Congress | 115th Congress |
| Confirmed | 60 | 111 | 134 | 20 | 85 |
| Returned | 50 | 40 | 69 | 52 | 99 |
| Withdrawn | 1 | 3 | 3 | 0 | 1 |