| Current (2) |
| Chairman | 2023 |
| Board of Directors | 2025 |
| Former (20) |
| Board of Directors | 1992 – 1992 |
| Board of Directors | 1997 – 1999 |
| Board of Directors | 1992 – 2002 |
| Board of Directors | 1996 – 1997 |
| Chairman | 2017 – 2019 |
| Board of Directors | 1998 – 2001 |
| Chairman | 2004 – 2006 |
| Board of Directors | 2017 – 2023 |
| Chairman | 2006 – 2016 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 2017 – 2017 |
| Board of Directors | 2023 – 2025 |
| Chairman | 2000 – 2004 |
| Board of Directors | 1992 – 1999 |
| Board of Directors | 1992 – 1992 |
| Board of Directors | 1998 – 2015 |
| Chairman | 2019 – 2023 |
| Board of Directors | 1992 – 2006 |
| Chairman | 2017 – 2017 |
| Board of Directors | 2015 – 2016 |