| Former (23) |
| Board of Directors | 1999 – 2000 |
| Board of Directors | 1982 – 1992 |
| Deputy Chairman | 2004 – 2009 |
| Chairman | 2011 – 2014 |
| Chairman | 1982 – 1988 |
| Board of Directors | 2011 – 2018 |
| Chairman | 2018 – 2019 |
| Board of Directors | 1982 – 1989 |
| Board of Directors | 1982 – 1991 |
| Deputy Chairman | 1998 – 2004 |
| Deputy Chairman | 2015 – 2018 |
| Board of Directors | 1982 – 1991 |
| Board of Directors | 1982 – 1991 |
| Board of Directors | 1982 – 1993 |
| Board of Directors | 1982 – 1992 |
| Board of Directors | 2000 – 2004 |
| Board of Directors | 2005 – 2011 |
| Board of Directors | 1982 – 2008 |
| Chairman | 2014 – 2018 |
| Deputy Chairman | 2018 – 2019 |
| Chairman | 1982 – 1998 |
| Board of Directors | 1982 – 1995 |
| Board of Directors | 2016 – 2018 |