| Former (21) |
| Board of Directors | 1986 – 2002 |
| Board of Directors | 2002 – 2007 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 2010 – 2011 |
| Board of Directors | 1994 – 1996 |
| Board of Directors | 1996 – 2000 |
| Board of Directors | 1986 – 1987 |
| Chairman | 2010 – 2011 |
| Chairman | 2007 – 2010 |
| Deputy Chairman | 1986 – 1996 |
| Deputy Chairman | 1996 – 2009 |
| Board of Directors | 2000 – 2011 |
| Chairman | 1986 – 1990 |
| Board of Directors | 1986 – 1990 |
| Board of Directors | 1986 – 2008 |
| Board of Directors | 2008 – 2011 |
| Chairman | 1986 – 1994 |
| Chairman | 1986 – 1987 |
| Deputy Chairman | 2009 – 2011 |
| Board of Directors | 1986 – 1994 |
| Chairman | 1994 – 2002 |