| Year | Start Date | End Date | Subject | Role |
| 1983 | - | - | Corporation Member | |
| 1984 | - | - | Corporation Member | |
| 1985 | - | - | Corporation Member | |
| 1986 | - | - | Corporation Member | |
| 1987 | - | - | Corporation Member | |
| 1988 | - | - | Corporation Member | |
| 1989 | - | - | Corporation Member | |
| 1990 | - | - | Corporation Member | |
| 1991 | - | - | Corporation Member | |
| 1992 | - | - | Corporation Member | |
| 1993 | - | - | Corporation Member | |
| 1994 | - | - | Corporation Member |