| Former (17) |
| Board of Directors | 1991 – 1996 |
| Board of Directors | 1997 – 1998 |
| Chairman | 1991 – 1996 |
| Board of Directors | 1999 – 2007 |
| Chairman | 1996 – 1998 |
| Board of Directors | 1991 – 1997 |
| Board of Directors | 2004 – 2008 |
| Chairman | 2008 – 2010 |
| Chairman | 1991 – 1995 |
| Board of Directors | 1999 – 2004 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 2008 – 2010 |
| Deputy Chairman | 1999 – 1999 |
| Chairman | 2000 – 2008 |
| Chairman | 1998 – 1999 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 1991 – 1996 |