| Current (2) |
| Chairman | 2026 |
| Board of Directors | 2018 |
| Former (14) |
| Board of Directors | 2001 – 2005 |
| Board of Directors | 2013 – 2015 |
| Board of Directors | 2005 – 2013 |
| Chairman | 2013 – 2013 |
| Board of Directors | 2001 – 2005 |
| Chairman | 2013 – 2020 |
| Board of Directors | 1998 – 2001 |
| Chairman | 2012 – 2013 |
| Board of Directors | 2005 – 2010 |
| Chairman | 1999 – 2010 |
| Board of Directors | 2015 – 2018 |
| Chairman | 2020 – 2026 |
| Chairman | 1998 – 1999 |
| Chairman | 2010 – 2012 |