| Races | 11 | 10 | 5 | 27 | 13 | 28 | 4 | 4 | 6 | 108 |
|---|---|---|---|---|---|---|---|---|---|---|
| Class | Central | Great Lakes | Midwest | Northeast | Northern Pacific | Southeast | Southern Pacific | Southwest | Rocky Mountain | Total Class Entries |
| AS | 11 | 28 | 3 | 68 | 27 | 8 | 2 | 5 | 0 | 152 |
| ASR | 9 | 2 | 1 | 1 | 4 | 13 | 2 | 0 | 0 | 32 |
| B-Spec | 16 | 18 | 0 | 28 | 3 | 33 | 0 | 23 | 0 | 121 |
| BIT | 0 | 0 | 0 | 162 | 0 | 2 | 0 | 0 | 0 | 164 |
| CF | 0 | 0 | 0 | 25 | 8 | 10 | 1 | 0 | 9 | 53 |
| CFC | 2 | 27 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 34 |
| CFF | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
| CP1 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 2 |
| CS2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 2 |
| DSR | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| E1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| E3 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 5 |
| E4 | 0 | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 14 |
| E5 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| EM2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| END | 0 | 0 | 0 | 0 | 0 | 19 | 0 | 9 | 0 | 28 |
| EP | 3 | 12 | 4 | 57 | 7 | 57 | 5 | 4 | 1 | 150 |
| F4 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 0 | 0 | 4 |
| F5 | 10 | 8 | 3 | 8 | 1 | 24 | 0 | 0 | 0 | 54 |
| FA | 9 | 7 | 2 | 12 | 76 | 36 | 8 | 3 | 6 | 159 |
| FB | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 5 |
| FC | 9 | 21 | 4 | 18 | 46 | 45 | 14 | 4 | 0 | 161 |
| FE | 1 | 2 | 0 | 4 | 1 | 2 | 0 | 0 | 0 | 10 |
| FE2 | 5 | 7 | 0 | 15 | 7 | 34 | 2 | 12 | 0 | 82 |
| FF | 11 | 23 | 3 | 22 | 47 | 76 | 6 | 6 | 5 | 199 |
| FFT | 0 | 0 | 0 | 0 | 12 | 0 | 0 | 0 | 0 | 12 |
| FFTS | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 0 | 10 |
| FM | 3 | 0 | 0 | 0 | 26 | 0 | 0 | 0 | 0 | 29 |
| FP | 11 | 12 | 3 | 37 | 2 | 37 | 3 | 4 | 2 | 111 |
| FS | 1 | 0 | 1 | 5 | 0 | 18 | 0 | 0 | 0 | 25 |
| FST | 1 | 12 | 0 | 8 | 5 | 1 | 0 | 0 | 0 | 27 |
| FV | 3 | 13 | 0 | 163 | 15 | 45 | 2 | 7 | 2 | 250 |
| FX | 5 | 5 | 3 | 21 | 57 | 21 | 4 | 17 | 1 | 134 |
| GT1 | 17 | 7 | 5 | 28 | 11 | 34 | 0 | 1 | 0 | 103 |
| GT2 | 17 | 11 | 5 | 58 | 28 | 45 | 7 | 6 | 0 | 177 |
| GT3 | 2 | 3 | 2 | 3 | 6 | 20 | 3 | 0 | 0 | 39 |
| GTA | 1 | 4 | 0 | 10 | 0 | 41 | 0 | 0 | 0 | 56 |
| GTL | 6 | 7 | 4 | 12 | 4 | 17 | 2 | 0 | 0 | 52 |
| GTP | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 0 | 9 |
| GTX | 1 | 1 | 0 | 4 | 2 | 2 | 1 | 1 | 1 | 13 |
| HP | 10 | 14 | 4 | 65 | 3 | 71 | 4 | 4 | 0 | 175 |
| HRG1 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 4 |
| HRG2 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 6 |
| HRG3 | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 0 | 9 |
| HRG4 | 0 | 0 | 0 | 13 | 0 | 0 | 0 | 0 | 0 | 13 |
| HRG5 | 0 | 0 | 0 | 16 | 0 | 0 | 0 | 0 | 0 | 16 |
| IT7 | 0 | 5 | 0 | 40 | 0 | 33 | 0 | 0 | 0 | 78 |
| IT7R | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 6 |
| ITA | 19 | 38 | 0 | 138 | 104 | 152 | 0 | 0 | 1 | 452 |
| ITB | 1 | 13 | 0 | 57 | 0 | 48 | 0 | 0 | 1 | 120 |
| ITC | 0 | 35 | 0 | 15 | 0 | 18 | 0 | 0 | 0 | 68 |
| ITE | 0 | 4 | 0 | 23 | 40 | 1 | 3 | 0 | 1 | 72 |
| ITE1 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 |
| ITE2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
| ITEZ | 0 | 0 | 0 | 6 | 0 | 14 | 0 | 0 | 0 | 20 |
| ITJ | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 |
| ITO | 0 | 0 | 0 | 0 | 0 | 20 | 0 | 0 | 0 | 20 |
| ITR | 0 | 2 | 1 | 10 | 6 | 76 | 0 | 0 | 0 | 95 |
| ITS | 4 | 10 | 0 | 57 | 6 | 166 | 0 | 0 | 2 | 245 |
| ITT | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 2 |
| ITX | 0 | 0 | 0 | 0 | 53 | 1 | 0 | 0 | 0 | 54 |
| LC | 0 | 1 | 0 | 2 | 0 | 1 | 0 | 0 | 0 | 4 |
| MC | 0 | 0 | 0 | 0 | 27 | 0 | 0 | 0 | 0 | 27 |
| N3 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| NCF | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 |
| P1 | 3 | 3 | 0 | 10 | 31 | 17 | 1 | 2 | 0 | 67 |
| P2 | 9 | 7 | 0 | 35 | 18 | 28 | 8 | 2 | 1 | 108 |
| PCA3 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| PX | 0 | 0 | 0 | 2 | 1 | 4 | 2 | 0 | 0 | 9 |
| R1 | 0 | 0 | 0 | 0 | 0 | 19 | 0 | 0 | 0 | 19 |
| R2 | 0 | 0 | 0 | 0 | 0 | 15 | 0 | 0 | 0 | 15 |
| S2 | 2 | 7 | 0 | 2 | 6 | 0 | 6 | 0 | 0 | 23 |
| S7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 29 | 29 |
| S944 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
| SC | 0 | 0 | 0 | 6 | 1 | 0 | 1 | 0 | 0 | 8 |
| SE30 | 0 | 0 | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 11 |
| SE46 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| SF | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| SM | 127 | 132 | 5 | 434 | 54 | 297 | 23 | 46 | 5 | 1123 |
| SM2 | 0 | 0 | 0 | 102 | 0 | 0 | 0 | 0 | 0 | 102 |
| SM5 | 0 | 0 | 0 | 1 | 0 | 5 | 0 | 0 | 0 | 6 |
| SMG | 0 | 0 | 0 | 0 | 45 | 0 | 0 | 0 | 0 | 45 |
| SMSE | 0 | 0 | 0 | 0 | 0 | 72 | 0 | 0 | 0 | 72 |
| SMSET | 0 | 0 | 0 | 0 | 0 | 18 | 0 | 0 | 0 | 18 |
| SMT | 31 | 0 | 0 | 0 | 262 | 257 | 3 | 0 | 0 | 553 |
| SMX | 0 | 2 | 0 | 6 | 14 | 49 | 1 | 0 | 0 | 72 |
| SP | 0 | 2 | 0 | 0 | 10 | 0 | 3 | 2 | 2 | 19 |
| SPB | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 3 |
| SPO | 10 | 0 | 0 | 23 | 0 | 52 | 0 | 0 | 0 | 85 |
| SPU | 3 | 2 | 0 | 11 | 1 | 36 | 0 | 0 | 0 | 53 |
| SR | 3 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 |
| SRF | 55 | 10 | 0 | 43 | 39 | 41 | 0 | 0 | 0 | 188 |
| SRF3 | 128 | 100 | 6 | 235 | 225 | 212 | 31 | 32 | 19 | 988 |
| SRFx | 0 | 0 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 30 |
| SRX7 | 0 | 0 | 0 | 17 | 0 | 0 | 0 | 0 | 0 | 17 |
| SS | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 5 |
| SSC5 | 0 | 0 | 0 | 0 | 19 | 0 | 0 | 0 | 0 | 19 |
| SSM | 0 | 0 | 0 | 253 | 59 | 24 | 0 | 0 | 0 | 336 |
| STL | 30 | 40 | 3 | 191 | 20 | 203 | 15 | 6 | 1 | 509 |
| STU | 12 | 10 | 2 | 42 | 15 | 89 | 1 | 6 | 3 | 180 |
| T1 | 1 | 14 | 0 | 16 | 17 | 24 | 0 | 2 | 7 | 81 |
| T2 | 3 | 2 | 2 | 25 | 9 | 19 | 3 | 3 | 0 | 66 |
| T3 | 22 | 8 | 3 | 36 | 11 | 59 | 1 | 3 | 4 | 147 |
| T4 | 13 | 4 | 0 | 50 | 6 | 43 | 5 | 5 | 0 | 126 |
| THR | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 1 | 0 | 5 |
| VFSR | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 4 |
| VIN | 41 | 0 | 15 | 0 | 0 | 66 | 0 | 0 | 0 | 122 |
| Vintage | 0 | 0 | 0 | 0 | 0 | 15 | 0 | 0 | 0 | 15 |
| VP1 | 0 | 0 | 0 | 0 | 11 | 0 | 0 | 0 | 0 | 11 |
| VP2 | 0 | 0 | 0 | 0 | 13 | 0 | 0 | 0 | 0 | 13 |
| VP3 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 2 |
| Total (Average) | 710 (64.5) | 702 (70.2) | 84 (16.8) | 2852 (105.6) | 1543 (118.7) | 2913 (104) | 188 (47) | 216 (54) | 109 (18.2) | 9317 (86.3) |