| Current (2) |
| Board of Directors | 2006 |
| Chairman | 2006 |
| Former (19) |
| Board of Directors | 1987 – 1991 |
| Board of Directors | 2006 – 2009 |
| Chairman | 2002 – 2005 |
| Deputy Chairman | 2005 – 2006 |
| Board of Directors | 1987 – 1991 |
| Board of Directors | 1987 – 1991 |
| Board of Directors | 1987 – 1991 |
| Board of Directors | 1987 – 1991 |
| Board of Directors | 1987 – 1994 |
| Board of Directors | 1987 – 1991 |
| Board of Directors | 1987 – 2002 |
| Deputy Chairman | 2002 – 2005 |
| Board of Directors | 2005 – 2006 |
| Chairman | 1987 – 1994 |
| Board of Directors | 1987 – 1999 |
| Deputy Chairman | 2002 – 2002 |
| Chairman | 2005 – 2006 |
| Board of Directors | 1987 – 1992 |
| Board of Directors | 1987 – 1994 |