| Current (3) |
| Deputy Chairman | 2022 |
| Board of Directors | 2016 |
| Chairman | 2023 |
| Former (31) |
| Chairman | 2001 – 2004 |
| Board of Directors | 2004 – 2007 |
| Chairman | 2017 – 2017 |
| Board of Directors | 2004 – 2009 |
| Chairman | 2011 – 2013 |
| Board of Directors | 2011 – 2016 |
| Board of Directors | 1977 – 2004 |
| Deputy Chairman | 2013 – 2013 |
| Board of Directors | 2000 – 2001 |
| Chairman | 2007 – 2007 |
| Board of Directors | 2017 – 2018 |
| Chairman | 2017 – 2023 |
| Deputy Chairman | 2009 – 2013 |
| Board of Directors | 1977 – 1989 |
| Board of Directors | 2009 – 2016 |
| Chairman | 1996 – 2000 |
| Board of Directors | 1977 – 1995 |
| Deputy Chairman | 2016 – 2017 |
| Board of Directors | 1996 – 2000 |
| Chairman | 2013 – 2015 |
| Chairman | 2009 – 2011 |
| Deputy Chairman | 2015 – 2016 |
| Board of Directors | 1995 – 1996 |
| Deputy Chairman | 2017 – 2022 |
| Deputy Chairman | 2017 – 2017 |
| Chairman | 2004 – 2007 |
| Board of Directors | 2004 – 2009 |
| Board of Directors | 2016 – 2017 |
| Board of Directors | 2000 – 2001 |
| Board of Directors | 2009 – 2011 |
| Chairman | 2015 – 2017 |