| Current (3) |
| Board of Directors | 2023 |
| Board of Directors | 2022 |
| Chairman | 2023 |
| Former (15) |
| Board of Directors | 1991 – 1994 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 1991 – 1991 |
| Board of Directors | 2000 – 2017 |
| Chairman | 2003 – 2006 |
| Board of Directors | 1997 – 2006 |
| Board of Directors | 2006 – 2014 |
| Board of Directors | 2018 – 2022 |
| Chairman | 2006 – 2017 |
| Board of Directors | 1998 – 1999 |
| Board of Directors | 2006 – 2006 |
| Board of Directors | 1991 – 1997 |
| Chairman | 2017 – 2021 |
| Board of Directors | 1999 – 2000 |
| Chairman | 1991 – 1997 |
