| Board of Directors | 2011 – 2013 |
| Chairman | 2005 – 2006 |
| Board of Directors | 2006 – 2014 |
| Board of Directors | 1986 – 1998 |
| Chairman | 1986 – 1997 |
| Board of Directors | 2006 – 2011 |
| Chairman | 2006 – 2007 |
| Board of Directors | 2013 – 2015 |
| Board of Directors | 1986 – 1998 |
| Chairman | 2019 – 2021 |
| Board of Directors | 1986 – 1989 |
| Board of Directors | 1998 – 2005 |
| Chairman | 2007 – 2019 |
| Board of Directors | 2019 – 2021 |
| Board of Directors | 1997 – 2005 |
| Board of Directors | 2005 – 2007 |
| Board of Directors | 1986 – 2006 |
| Board of Directors | 1999 – 2006 |
| Board of Directors | 2014 – 2021 |
| Board of Directors | 2005 – 2007 |