| Current (2) |
| Chairman | 2022 |
| Board of Directors | 2026 |
| Former (15) |
| Chairman | 2015 – 2021 |
| Board of Directors | 1998 – 2012 |
| Board of Directors | 1998 – 2000 |
| Board of Directors | 1998 – 2009 |
| Chairman | 2021 – 2022 |
| Board of Directors | 2003 – 2015 |
| Chairman | 2022 – 2022 |
| Board of Directors | 1998 – 2003 |
| Board of Directors | 2014 – 2016 |
| Chairman | 2013 – 2015 |
| Board of Directors | 2022 – 2022 |
| Board of Directors | 2013 – 2022 |
| Board of Directors | 2012 – 2022 |
| Board of Directors | 2008 – 2014 |
| Board of Directors | 1998 – 2002 |