| Races | 6 | 5 | 3 | 12 | 11 | 19 | 4 | 5 | 5 | 70 |
|---|---|---|---|---|---|---|---|---|---|---|
| Class | Central | Great Lakes | Midwest | Northeast | Northern Pacific | Southeast | Southern Pacific | Southwest | Rocky Mountain | Total Class Entries |
| AS | 3 | 38 | 2 | 27 | 23 | 3 | 1 | 1 | 0 | 98 |
| ASR | 0 | 3 | 0 | 0 | 3 | 12 | 1 | 0 | 0 | 19 |
| B-Spec | 0 | 5 | 2 | 10 | 3 | 10 | 1 | 4 | 0 | 35 |
| BIT | 0 | 0 | 0 | 52 | 0 | 1 | 0 | 0 | 0 | 53 |
| CF | 0 | 0 | 0 | 14 | 1 | 2 | 2 | 0 | 7 | 26 |
| CFC | 0 | 15 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 17 |
| CFF | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 |
| CP1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| DSR | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 2 |
| E1 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 3 |
| E30 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 |
| E4 | 0 | 0 | 0 | 18 | 0 | 0 | 0 | 0 | 0 | 18 |
| E5 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| EP | 2 | 10 | 0 | 26 | 8 | 52 | 3 | 2 | 2 | 105 |
| F3 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 0 | 3 |
| F4 | 0 | 0 | 0 | 0 | 29 | 0 | 4 | 0 | 0 | 33 |
| F5 | 2 | 12 | 0 | 6 | 1 | 17 | 0 | 0 | 0 | 38 |
| FA | 2 | 5 | 1 | 5 | 27 | 21 | 4 | 3 | 1 | 69 |
| FB | 0 | 0 | 0 | 3 | 0 | 1 | 0 | 0 | 0 | 4 |
| FC | 1 | 22 | 0 | 26 | 28 | 27 | 20 | 0 | 0 | 124 |
| FE | 2 | 2 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 8 |
| FE2 | 3 | 5 | 0 | 7 | 3 | 17 | 6 | 5 | 0 | 46 |
| FF | 6 | 18 | 1 | 14 | 31 | 52 | 4 | 0 | 3 | 129 |
| FFT | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 2 |
| FFTS | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 3 |
| FM | 1 | 0 | 0 | 0 | 29 | 1 | 0 | 0 | 0 | 31 |
| FP | 6 | 7 | 1 | 26 | 1 | 35 | 5 | 2 | 0 | 83 |
| FS | 1 | 1 | 0 | 1 | 3 | 14 | 0 | 0 | 0 | 20 |
| FST | 1 | 1 | 0 | 7 | 3 | 0 | 0 | 0 | 0 | 12 |
| FV | 1 | 3 | 0 | 108 | 7 | 38 | 4 | 1 | 6 | 168 |
| FX | 6 | 5 | 0 | 5 | 11 | 16 | 10 | 7 | 2 | 62 |
| GT1 | 2 | 9 | 0 | 17 | 10 | 28 | 0 | 0 | 0 | 66 |
| GT2 | 6 | 12 | 0 | 29 | 19 | 34 | 9 | 2 | 1 | 112 |
| GT3 | 0 | 5 | 0 | 2 | 5 | 13 | 3 | 0 | 0 | 28 |
| GTA | 0 | 2 | 1 | 4 | 0 | 31 | 0 | 0 | 0 | 38 |
| GTL | 1 | 6 | 5 | 7 | 5 | 13 | 5 | 1 | 0 | 43 |
| GTP | 0 | 0 | 0 | 7 | 0 | 0 | 0 | 0 | 0 | 7 |
| GTX | 0 | 2 | 0 | 1 | 1 | 2 | 1 | 1 | 3 | 11 |
| HP | 5 | 11 | 2 | 27 | 6 | 50 | 3 | 1 | 1 | 106 |
| HRG1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 |
| HRG2 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 6 |
| HRG3 | 0 | 0 | 0 | 8 | 0 | 0 | 0 | 0 | 0 | 8 |
| HRG4 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | 0 | 0 | 10 |
| HRG5 | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 0 | 9 |
| IT7 | 0 | 4 | 0 | 32 | 0 | 22 | 0 | 0 | 0 | 58 |
| IT7R | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 6 |
| ITA | 6 | 33 | 1 | 58 | 82 | 99 | 2 | 0 | 0 | 281 |
| ITB | 0 | 12 | 0 | 41 | 0 | 35 | 0 | 0 | 2 | 90 |
| ITC | 1 | 11 | 0 | 13 | 0 | 10 | 0 | 0 | 0 | 35 |
| ITE | 0 | 6 | 1 | 21 | 10 | 2 | 3 | 2 | 0 | 45 |
| ITE1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| ITE2 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| ITEZ | 0 | 0 | 0 | 9 | 0 | 8 | 0 | 0 | 0 | 17 |
| ITJ | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 |
| ITO | 0 | 0 | 0 | 0 | 0 | 23 | 0 | 0 | 0 | 23 |
| ITR | 0 | 1 | 0 | 4 | 2 | 49 | 0 | 0 | 0 | 56 |
| ITS | 2 | 6 | 0 | 21 | 2 | 104 | 0 | 0 | 1 | 136 |
| ITT | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
| ITX | 0 | 0 | 0 | 0 | 19 | 0 | 0 | 0 | 0 | 19 |
| MC | 0 | 0 | 0 | 0 | 8 | 0 | 0 | 0 | 0 | 8 |
| NCF | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| P1 | 0 | 1 | 0 | 4 | 24 | 19 | 3 | 0 | 0 | 51 |
| P2 | 8 | 1 | 0 | 14 | 11 | 20 | 6 | 1 | 0 | 61 |
| PCA2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| PCA3 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| PX | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 3 |
| R1 | 0 | 0 | 0 | 0 | 0 | 21 | 0 | 0 | 0 | 21 |
| R2 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 6 |
| RS | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
| S2 | 0 | 3 | 0 | 0 | 2 | 0 | 6 | 0 | 0 | 11 |
| S7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 16 |
| SC | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 |
| SE30 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| SF | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 |
| SM | 75 | 90 | 1 | 223 | 63 | 201 | 21 | 13 | 2 | 689 |
| SM2 | 0 | 0 | 0 | 65 | 0 | 0 | 0 | 0 | 0 | 65 |
| SM5 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 2 |
| SMG | 0 | 0 | 0 | 0 | 23 | 0 | 0 | 0 | 0 | 23 |
| SMSE | 0 | 0 | 0 | 0 | 0 | 64 | 0 | 0 | 0 | 64 |
| SMSET | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 4 |
| SMT | 16 | 0 | 0 | 0 | 115 | 170 | 4 | 0 | 0 | 305 |
| SMX | 15 | 0 | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 29 |
| SP | 0 | 2 | 0 | 0 | 5 | 0 | 5 | 3 | 2 | 17 |
| SPB | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 3 | 0 | 5 |
| SPM | 0 | 0 | 0 | 0 | 12 | 0 | 0 | 0 | 0 | 12 |
| SPO | 9 | 0 | 0 | 20 | 9 | 31 | 0 | 0 | 0 | 69 |
| SPO/D | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 |
| SPU | 2 | 2 | 0 | 7 | 3 | 31 | 0 | 0 | 0 | 45 |
| SR | 0 | 2 | 0 | 7 | 0 | 0 | 0 | 0 | 0 | 9 |
| SRF | 20 | 5 | 1 | 24 | 24 | 30 | 2 | 0 | 0 | 106 |
| SRF3 | 60 | 45 | 0 | 123 | 128 | 156 | 29 | 11 | 10 | 562 |
| SRX7 | 0 | 0 | 0 | 10 | 0 | 1 | 0 | 0 | 0 | 11 |
| SSC5 | 0 | 0 | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 14 |
| SSM | 0 | 0 | 0 | 101 | 41 | 10 | 0 | 0 | 0 | 152 |
| STL | 7 | 27 | 1 | 88 | 19 | 155 | 16 | 3 | 1 | 317 |
| STU | 4 | 9 | 0 | 15 | 4 | 82 | 4 | 4 | 2 | 124 |
| T1 | 1 | 23 | 0 | 24 | 15 | 32 | 0 | 1 | 3 | 99 |
| T2 | 6 | 1 | 0 | 9 | 5 | 6 | 2 | 1 | 2 | 32 |
| T3 | 12 | 6 | 0 | 25 | 19 | 31 | 0 | 8 | 3 | 104 |
| T4 | 6 | 2 | 0 | 18 | 13 | 27 | 2 | 8 | 2 | 78 |
| VFSR | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 3 |
| VIN | 26 | 0 | 0 | 0 | 0 | 41 | 0 | 0 | 0 | 67 |
| Vintage | 0 | 0 | 0 | 8 | 0 | 5 | 0 | 0 | 0 | 13 |
| Vintage | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | 10 |
| VP1 | 0 | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 9 |
| VP2 | 0 | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 9 |
| VP3 | 0 | 0 | 0 | 0 | 7 | 0 | 0 | 0 | 0 | 7 |
| Total (Average) | 341 (56.8) | 492 (98.4) | 20 (6.7) | 1487 (123.9) | 984 (89.5) | 2005 (105.5) | 196 (49) | 88 (17.6) | 74 (14.8) | 5687 (81.2) |