| Current (4) |
| Chairman | 2016 |
| Board of Directors | 2001 |
| Board of Directors | 2022 |
| Board of Directors | 2015 |
| Former (14) |
| Chairman | 1996 – 1997 |
| Board of Directors | 2000 – 2009 |
| Board of Directors | 2019 – 2020 |
| Board of Directors | 1997 – 1998 |
| Chairman | 2014 – 2016 |
| Board of Directors | 2001 – 2003 |
| Board of Directors | 2006 – 2008 |
| Chairman | 2006 – 2007 |
| Board of Directors | 2015 – 2016 |
| Board of Directors | 1997 – 2000 |
| Chairman | 1997 – 1998 |
| Board of Directors | 2014 – 2016 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 2001 – 2003 |