| Former (16) |
| Board of Directors | 2018 – 2024 |
| Chairman | 2018 – 2024 |
| Board of Directors | 2000 – 2006 |
| Board of Directors | 1989 – 1992 |
| Board of Directors | 1989 – 1990 |
| Board of Directors | 1989 – 2011 |
| Board of Directors | 1990 – 1992 |
| Chairman | 2012 – 2018 |
| Board of Directors | 2006 – 2010 |
| Board of Directors | 1989 – 1992 |
| Board of Directors | 1989 – 2000 |
| Board of Directors | 1989 – 1992 |
| Board of Directors | 1989 – 2011 |
| Board of Directors | 2011 – 2018 |
| Chairman | 1989 – 1990 |
| Board of Directors | 2006 – 2011 |