| Current (2) |
| Chairman | 2022 |
| Deputy Chairman | 2023 |
| Former (27) |
| Board of Directors | 1988 – 1989 |
| Board of Directors | 2005 – 2005 |
| Board of Directors | 2002 – 2005 |
| Board of Directors | 2005 – 2009 |
| Board of Directors | 1988 – 1988 |
| Board of Directors | 2006 – 2010 |
| Board of Directors | 1988 – 1989 |
| Board of Directors | 2005 – 2013 |
| Board of Directors | 1988 – 1992 |
| Board of Directors | 1988 – 1996 |
| Board of Directors | 1988 – 2005 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1988 – 1990 |
| Board of Directors | 1988 – 1991 |
| Board of Directors | 2008 – 2018 |
| Chairman | 1988 – 1994 |
| Board of Directors | 2004 – 2005 |
| Board of Directors | 2010 – 2018 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 2006 – 2018 |
| Board of Directors | 1988 – 1993 |
| Board of Directors | 1997 – 2002 |
| Chairman | 1988 – 1988 |
| Board of Directors | 1988 – 1992 |
| Board of Directors | 2018 – 2021 |
| Chairman | 1988 – 2004 |
| Chairman | 2009 – 2022 |