Balling's GP Attendance:
| 1989 | U.S. Grand Prix (Phoenix) |
|---|---|
| 1990 | U.S. Grand Prix (Phoenix) |
| 1991 | Mexican Grand Prix (Mexico City) U.S. Grand Prix (Phoenix) |
| 1992 | Canadian Grand Prix (Montreal) |
| 1994 | Canadian Grand Prix (Montreal) |
| 1995 | Canadian Grand Prix (Montreal) |
Robert Balling