| Current (3) |
| Chairman | 2022 |
| Board of Directors | 2022 |
| Board of Directors | 2022 |
| Former (21) |
| Chairman | 2017 – 2019 |
| Chairman | 2020 – 2022 |
| Chairman | 2015 – 2017 |
| Board of Directors | 2019 – 2020 |
| Board of Directors | 2019 – 2020 |
| Board of Directors | 1996 – 2008 |
| Chairman | 2000 – 2001 |
| Board of Directors | 1982 – 1996 |
| Board of Directors | 1982 – 1996 |
| Board of Directors | 2007 – 2009 |
| Board of Directors | 1982 – 1996 |
| Deputy Chairman | 2003 – 2006 |
| Board of Directors | 2006 – 2007 |
| Board of Directors | 2009 – 2019 |
| Board of Directors | 2009 – 2017 |
| Chairman | 1996 – 2000 |
| Board of Directors | 2020 – 2022 |
| Chairman | 2000 – 2015 |
| Deputy Chairman | 2001 – 2003 |
| Board of Directors | 2019 – 2022 |
| Board of Directors | 2008 – 2009 |