| Former (31) |
| Board of Directors | 2014 – 2018 |
| Board of Directors | 1989 – 1998 |
| Chairman | 2019 – 2022 |
| Board of Directors | 1989 – 2015 |
| Board of Directors | 2009 – 2018 |
| Board of Directors | 1997 – 2008 |
| Board of Directors | 2018 – 2022 |
| Deputy Chairman | 1989 – 1993 |
| Chairman | 1996 – 2001 |
| Board of Directors | 2019 – 2022 |
| Board of Directors | 1989 – 1997 |
| Board of Directors | 1989 – 1996 |
| Board of Directors | 2015 – 2022 |
| Board of Directors | 1989 – 2001 |
| Board of Directors | 1989 – 2008 |
| Chairman | 2014 – 2015 |
| Board of Directors | 2009 – 2014 |
| Board of Directors | 1989 – 2015 |
| Board of Directors | 1989 – 2008 |
| Deputy Chairman | 2015 – 2018 |
| Chairman | 2015 – 2019 |
| Board of Directors | 1989 – 2015 |
| Board of Directors | 1989 – 1991 |
| Board of Directors | 1989 – 1989 |
| Board of Directors | 1989 – 2015 |
| Board of Directors | 1989 – 2001 |
| Chairman | 2001 – 2014 |
| Board of Directors | 1989 – 2022 |
| Board of Directors | 1989 – 2001 |
| Board of Directors | 1989 – 1998 |
| Board of Directors | 2018 – 2018 |
