| 2000 Norway | 2001 Atlanta | 2002 Italy | 2003 NYC | |
| TOTAL | 358 | 355 | 372 | 460 |
| Members - paying | 150 | 154 | 160 | 258 |
| Early | 126 | 123 | 150 | 225 |
| Mid | 21 | 29 | 10 | 27 |
| Late | 3 | 2 | 2 | 6 |
| Non-Members - paying | 82 | 63 | 82 | 74 |
| Early | 64 | 47 | 72 | 63 |
| Mid | 17 | 14 | 8 | 11 |
| Late | 1 | 2 | 3 | 0 |
| Day - paying | 7 | 10 | 0 | 6 |
| Students - paying | 60 | 77 | 73 | 84 |
| Early | 42 | 60 | 62 | 76 |
| Mid | 13 | 12 | 6 | 5 |
| Late | 5 | 5 | 2 | 3 |
| Organizers/Volunteers/Awards | 20 | 13 | 25 | 15 |
| Scholarships | 11 | 13 | 6 | 1 |
| Sponsors Complimentary | 28 | 25 | 26 | 22 |
| TOTAL | 358 | 355 | 372 | 460 |
| Actually attended | 346 | 316 | 336 | 425 |