| Current (4) |
| Chairman | 2022 |
| Board of Directors | 2008 |
| Board of Directors | 2025 |
| Board of Directors | 2023 |
| Former (38) |
| Board of Directors | 1991 – 1999 |
| Board of Directors | 2000 – 2007 |
| Deputy Chairman | 2008 – 2008 |
| Board of Directors | 1991 – 1996 |
| Board of Directors | 1991 – 1991 |
| Board of Directors | 2010 – 2011 |
| Board of Directors | 2010 – 2012 |
| Board of Directors | 2008 – 2008 |
| Board of Directors | 2007 – 2008 |
| Board of Directors | 1991 – 1999 |
| Board of Directors | 2005 – 2007 |
| Board of Directors | 1999 – 2000 |
| Chairman | 2007 – 2010 |
| Board of Directors | 1991 – 1994 |
| Board of Directors | 1991 – 1994 |
| Board of Directors | 2022 – 2023 |
| Board of Directors | 2012 – 2022 |
| Board of Directors | 1999 – 1999 |
| Chairman | 2010 – 2013 |
| Board of Directors | 2011 – 2012 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 1999 – 2001 |
| Chairman | 2017 – 2021 |
| Board of Directors | 2008 – 2010 |
| Board of Directors | 2001 – 2005 |
| Board of Directors | 2012 – 2019 |
| Board of Directors | 2007 – 2007 |
| Deputy Chairman | 2005 – 2007 |
| Board of Directors | 1991 – 1996 |
| Chairman | 2014 – 2017 |
| Deputy Chairman | 2001 – 2005 |
| Chairman | 1999 – 1999 |
| Board of Directors | 1998 – 1999 |
| Board of Directors | 2000 – 2005 |
| Chairman | 1991 – 1993 |
| Chairman | 1991 – 1991 |
| Board of Directors | 2005 – 2007 |
| Chairman | 2014 – 2014 |