| Current (2) |
| Management | 2025 |
| Chief Executive Officer | 2023 |
| Former (23) |
| Management | 1980 – 2010 |
| Chief Executive Officer | 2011 – 2018 |
| Deputy | 2004 – 2008 |
| Chief Executive Officer | 1980 – 2011 |
| Deputy | 2016 – 2020 |
| Deputy | 2004 – 2008 |
| Deputy | 2008 – 2012 |
| Deputy | 1980 – 1991 |
| Deputy | 2008 – 2008 |
| Management | 2018 – 2025 |
| Deputy | 2000 – 2004 |
| Deputy | 2000 – 2001 |
| Deputy | 2021 – 2022 |
| Chief Executive Officer | 1980 – 1989 |
| Deputy | 2012 – 2016 |
| Deputy | 2012 – 2016 |
| Deputy | 2004 – 2012 |
| Deputy | 1980 – 1995 |
| Deputy | 1995 – 2004 |
| Deputy | 1995 – 2000 |
| Deputy | 1995 – 1997 |
| Management | 2014 – 2018 |
| Chief Executive Officer | 2018 – 2023 |