| Current (2) |
| Board of Directors | 2023 |
| Chairman | 2017 |
| Former (20) |
| Board of Directors | 2004 – 2005 |
| Board of Directors | 2010 – 2011 |
| Chairman | 2014 – 2015 |
| Board of Directors | 1992 – 1995 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 2011 – 2015 |
| Board of Directors | 1992 – 1995 |
| Board of Directors | 1992 – 1996 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 2016 – 2017 |
| Chairman | 1998 – 2004 |
| Chairman | 2015 – 2017 |
| Board of Directors | 1996 – 1997 |
| Chairman | 2005 – 2009 |
| Chairman | 2004 – 2005 |
| Board of Directors | 2005 – 2010 |
| Board of Directors | 1997 – 1998 |
| Board of Directors | 1998 – 2001 |
| Board of Directors | 1992 – 1995 |