Unique Drivers per Class Across Seasons
| Place | Class | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | SM | 45 | 68 | 87 | 87 | 79 | 56 | 66 | 61 | 63 | 64 | 63 |
| 2 | SRF3 | 36 | 67 | 54 | 47 | 42 | 23 | 49 | 43 | 32 | 37 | 15 |
| 3 | SSM | 31 | 68 | 64 | 83 | 74 | 50 | 76 | 76 | 75 | 76 | 80 |
| 4 | STL | 17 | 40 | 37 | 38 | 40 | 26 | 42 | 31 | 40 | 30 | 25 |
| 5 | ITA | 11 | 18 | 26 | 28 | 31 | 12 | 30 | 33 | 31 | 29 | 21 |
| 6 | HP | 9 | 20 | 18 | 15 | 17 | 12 | 11 | 9 | 11 | 10 | 12 |
| 7 | T2 | 8 | 4 | 3 | 6 | 3 | 1 | 6 | 5 | 2 | 1 | 0 |
| 8 | T4 | 8 | 10 | 12 | 6 | 13 | 4 | 5 | 4 | 5 | 5 | 3 |
| 9 | B-Spec | 6 | 10 | 10 | 4 | 5 | 1 | 2 | 0 | 0 | 0 | 1 |
| 10 | AS | 5 | 15 | 18 | 16 | 23 | 11 | 8 | 7 | 8 | 7 | 6 |
| 11 | GT2 | 5 | 8 | 9 | 5 | 7 | 3 | 7 | 6 | 5 | 4 | 2 |
| 12 | FP | 4 | 7 | 13 | 6 | 8 | 6 | 13 | 10 | 10 | 7 | 8 |
| 13 | ITB | 4 | 14 | 17 | 14 | 15 | 17 | 19 | 20 | 30 | 30 | 29 |
| 14 | ITS | 3 | 10 | 14 | 14 | 15 | 9 | 19 | 23 | 24 | 27 | 29 |
| 15 | P2 | 3 | 4 | 7 | 6 | 5 | 1 | 7 | 10 | 9 | 11 | 4 |
| 16 | SPO | 3 | 6 | 8 | 4 | 4 | 7 | 8 | 9 | 8 | 9 | 7 |
| 17 | T1 | 3 | 0 | 5 | 0 | 3 | 3 | 2 | 4 | 3 | 8 | 2 |
| 18 | CF | 2 | 9 | 11 | 9 | 8 | 8 | 13 | 10 | 7 | 8 | 8 |
| 19 | EP | 2 | 9 | 15 | 8 | 10 | 4 | 17 | 11 | 6 | 13 | 7 |
| 20 | F6 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 21 | FA | 2 | 2 | 3 | 4 | 3 | 2 | 2 | 2 | 0 | 1 | 1 |
| 22 | FC | 2 | 7 | 11 | 4 | 6 | 2 | 4 | 2 | 9 | 2 | 1 |
| 23 | GTP | 2 | 4 | 5 | 5 | 5 | 5 | 7 | 4 | 6 | 6 | 10 |
| 24 | SPU | 2 | 5 | 2 | 5 | 3 | 3 | 5 | 1 | 6 | 5 | 3 |
| 25 | STU | 2 | 7 | 5 | 7 | 17 | 8 | 7 | 13 | 14 | 11 | 9 |
| 26 | GT1 | 1 | 5 | 5 | 5 | 4 | 3 | 6 | 5 | 5 | 7 | 5 |
| 27 | GTA | 1 | 0 | 0 | 1 | 3 | 1 | 5 | 6 | 4 | 4 | 2 |
| 28 | ITE | 1 | 9 | 5 | 7 | 9 | 8 | 9 | 6 | 6 | 3 | 6 |
| 29 | LC | 1 | 2 | 0 | 0 | 0 | 0 | 3 | 7 | 9 | 8 | 9 |
| 30 | SRF | 1 | 1 | 5 | 2 | 2 | 2 | 4 | 3 | 2 | 11 | 28 |
| 31 | T3 | 1 | 8 | 12 | 7 | 3 | 5 | 7 | 4 | 8 | 5 | 3 |
