| Current (3) |
| Chairman | 2022 |
| Board of Directors | 2021 |
| Board of Directors | 2022 |
| Former (22) |
| Board of Directors | 1986 – 1995 |
| Board of Directors | 2011 – 2012 |
| Board of Directors | 1994 – 1994 |
| Board of Directors | 2011 – 2013 |
| Chairman | 2004 – 2006 |
| Board of Directors | 1986 – 2004 |
| Board of Directors | 1986 – 1993 |
| Board of Directors | 2004 – 2006 |
| Chairman | 1995 – 1996 |
| Chairman | 2001 – 2004 |
| Chairman | 2006 – 2011 |
| Chairman | 1996 – 2001 |
| Board of Directors | 2006 – 2011 |
| Deputy Chairman | 2014 – 2015 |
| Board of Directors | 1986 – 2003 |
| Chairman | 2011 – 2013 |
| Chairman | 1994 – 1995 |
| Board of Directors | 2003 – 2004 |
| Chairman | 2021 – 2021 |
| Board of Directors | 1986 – 1989 |
| Chairman | 1986 – 1993 |
| Chairman | 2013 – 2020 |