| Year | Start Date | End Date | Subject | Role |
| 1972 | - | - | Corporation Member | |
| 1973 | - | - | Corporation Member | |
| 1974 | - | - | Corporation Member | |
| 1975 | - | - | Corporation Member | |
| 1976 | - | - | Corporation Member | |
| 1977 | - | - | Corporation Member | |
| 1978 | - | - | Corporation Member | |
| 1979 | - | - | Corporation Member | |
| 1980 | - | - | Corporation Member | |
| 1981 | - | - | Corporation Member | |
| 1982 | - | - | Corporation Member | |
| 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 | |
| 1995 | - | - | Corporation Member | |
| 1996 | - | - | Corporation Member | |
| 1997 | - | - | Corporation Member | |
| 1998 | - | - | Corporation Member | |
| 1999 | - | - | Corporation Member | |
| 2000 | - | - | Corporation Member |