| Former (31) |
| Chairman | 2016 – 2016 |
| Board of Directors | 2014 – 2017 |
| Board of Directors | 1983 – 1999 |
| Board of Directors | 2001 – 2007 |
| Board of Directors | 2016 – 2017 |
| Board of Directors | 1983 – 1999 |
| Board of Directors | 2007 – 2012 |
| Board of Directors | 1983 – 1991 |
| Chairman | 2016 – 2017 |
| Board of Directors | 1983 – 1994 |
| Board of Directors | 2003 – 2004 |
| Chairman | 1996 – 1999 |
| Chairman | 2016 – 2016 |
| Board of Directors | 1983 – 1994 |
| Chairman | 2007 – 2007 |
| Board of Directors | 1999 – 2017 |
| Board of Directors | 1999 – 2004 |
| Board of Directors | 1983 – 2014 |
| Board of Directors | 1983 – 1996 |
| Board of Directors | 1996 – 1999 |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 1983 – 1988 |
| Chairman | 2007 – 2007 |
| Board of Directors | 1983 – 1987 |
| Board of Directors | 1999 – 1999 |
| Board of Directors | 1983 – 1988 |
| Chairman | 1983 – 1994 |
| Chairman | 2014 – 2016 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 1983 – 1994 |
| Board of Directors | 1983 – 1992 |