| Former (17) |
| Board of Directors | 2016 – 2025 |
| Board of Directors | 2005 – 2007 |
| Board of Directors | 2004 – 2005 |
| Board of Directors | 2019 – 2025 |
| Board of Directors | 2011 – 2019 |
| Chairman | 2013 – 2025 |
| Board of Directors | 1991 – 2002 |
| Board of Directors | 2011 – 2012 |
| Board of Directors | 1991 – 1996 |
| Board of Directors | 1991 – 1994 |
| Chairman | 2011 – 2013 |
| Chairman | 2004 – 2005 |
| Board of Directors | 1991 – 1992 |
| Board of Directors | 2005 – 2011 |
| Chairman | 2002 – 2004 |
| Board of Directors | 2004 – 2004 |
| Board of Directors | 2008 – 2011 |