| Board of Directors | 1995 – 1999 |
| Board of Directors | 1989 – 1995 |
| Board of Directors | 1989 – 1999 |
| Board of Directors | 1989 – 1991 |
| Board of Directors | 1989 – 1992 |
| Board of Directors | 2002 – 2006 |
| Board of Directors | 2006 – 2010 |
| Board of Directors | 1989 – 1993 |
| Chairman | 2012 – 2017 |
| Board of Directors | 1997 – 2002 |
| Chairman | 2008 – 2009 |
| Board of Directors | 1989 – 1995 |
| Board of Directors | 1989 – 1995 |
| Board of Directors | 1989 – 1992 |
| Board of Directors | 2009 – 2010 |
| Chairman | 1999 – 2006 |
| Board of Directors | 1989 – 1995 |
| Board of Directors | 2017 – 2019 |
| Board of Directors | 2010 – 2019 |
| Board of Directors | 2010 – 2012 |
| Chairman | 2018 – 2019 |
| Board of Directors | 2012 – 2019 |
| Board of Directors | 1995 – 1999 |
| Chairman | 1989 – 1991 |
| Chairman | 2006 – 2008 |
| Board of Directors | 1999 – 2002 |
| Board of Directors | 2002 – 2010 |
| Board of Directors | 1995 – 1999 |
| Board of Directors | 1989 – 1995 |
| Board of Directors | 1989 – 1991 |
| Chairman | 2010 – 2012 |