National Advanced and Challenge Convention (NACC)
Attendance Data
| Year | Location | A2 | C1 | C2 | C3A | C3B | C4 Basic |
C4 | Total |
| 1999 | Dayton, OH | 24 | 28 | 17 | 19 | 10 | 4 | 7 | 109 |
| 1998 | Louisville, KY | 26 | 28 | 22 | 19 | 14 | 6 | 5 | 120 |
| 1997 | Virginia Beach, VA | 25 | 28 | 23 | 15 | 13 | 3 | 6 | 113 |
| 1996 | Virginia Beach, VA | 24 | 29 | 28 | 17 | 10 | 4 | 6 | 118 |
| 1995 | Dayton, OH | 30 | 40 | 39 | 21 | 16 | 9 | 7 | 162 |
| 1994 | Virginia Beach, VA | 27 | 45 | 33 | 16 | 15 | 3 | 7 | 146 |
| 1993 | Louisville, KY | 30 | 62 | 41 | 22 | 23 | 3 | 8 | 189 |
| 1992 | Virginia Beach, VA | 36 | 49 | 29 | 22 | 21 | - | 9 | 166 |
| 1991 | Virginia Beach, VA | 43 | 45 | 35 | 23 | 22 | - | 8 | 176 |
| 1990 | Virginia Beach, VA | 49 | 62 | 40 | 22 | 25 | - | 7 | 205 |
