| Current (2) |
| Board of Directors | 2021 |
| Chairman | 2017 |
| Former (17) |
| Board of Directors | 1996 – 1997 |
| Chairman | 1992 – 1992 |
| Board of Directors | 1996 – 1997 |
| Chairman | 2007 – 2016 |
| Board of Directors | 1992 – 1995 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1992 – 1996 |
| Deputy Chairman | 2008 – 2016 |
| Board of Directors | 2017 – 2019 |
| Board of Directors | 2019 – 2021 |
| Board of Directors | 1992 – 1996 |
| Board of Directors | 1992 – 1997 |
| Deputy Chairman | 2007 – 2008 |
| Board of Directors | 1992 – 1992 |
| Chairman | 2017 – 2017 |
| Board of Directors | 1996 – 1997 |