| Current (2) |
| Chairman | 2021 |
| Board of Directors | 2023 |
| Former (36) |
| Deputy Chairman | 1997 – 2005 |
| Deputy Chairman | 2006 – 2007 |
| Chairman | 2011 – 2013 |
| Board of Directors | 1985 – 2005 |
| Board of Directors | 1985 – 1998 |
| Board of Directors | 1985 – 1995 |
| Board of Directors | 2007 – 2011 |
| Chairman | 2014 – 2014 |
| Board of Directors | 1998 – 2006 |
| Board of Directors | 1985 – 2006 |
| Deputy Chairman | 1985 – 1995 |
| Board of Directors | 2014 – 2015 |
| Board of Directors | 2003 – 2006 |
| Board of Directors | 1985 – 1995 |
| Board of Directors | 2015 – 2016 |
| Board of Directors | 2016 – 2021 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 1985 – 1994 |
| Board of Directors | 2022 – 2023 |
| Chairman | 2014 – 2014 |
| Chairman | 2006 – 2007 |
| Chairman | 2014 – 2016 |
| Chairman | 2016 – 2021 |
| Board of Directors | 2005 – 2006 |
| Board of Directors | 1985 – 1994 |
| Chairman | 2013 – 2014 |
| Board of Directors | 1985 – 1995 |
| Deputy Chairman | 1985 – 2001 |
| Board of Directors | 1985 – 2003 |
| Board of Directors | 2021 – 2022 |
| Chairman | 2007 – 2011 |
| Deputy Chairman | 1985 – 1997 |
| Board of Directors | 1985 – 2001 |
| Chairman | 1985 – 2006 |
| Board of Directors | 1985 – 1994 |
| Chairman | 1985 – 1994 |