| Board of Directors | 1991 – 1991 |
| Board of Directors | 1991 – 1991 |
| Board of Directors | 1997 – 2004 |
| Chairman | 1991 – 1993 |
| Chairman | 2017 – 2020 |
| Board of Directors | 1991 – 1993 |
| Board of Directors | 1998 – 2004 |
| Board of Directors | 2004 – 2020 |
| Board of Directors | 1991 – 2004 |
| Chairman | 1991 – 1998 |
| Board of Directors | 1991 – 1997 |
| Board of Directors | 2017 – 2020 |
| Board of Directors | 2004 – 2017 |
| Board of Directors | 2004 – 2015 |
| Board of Directors | 1991 – 1991 |