| Current (3) |
| Chairman | 2022 |
| Board of Directors | 2025 |
| Board of Directors | 2017 |
| Former (13) |
| Board of Directors | 2022 – 2025 |
| Board of Directors | 2013 – 2022 |
| Board of Directors | 2012 – 2017 |
| Board of Directors | 2009 – 2012 |
| Board of Directors | 1997 – 2012 |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 1993 – 2012 |
| Chairman | 1993 – 2005 |
| Board of Directors | 2013 – 2016 |
| Board of Directors | 2005 – 2012 |
| Chairman | 2013 – 2022 |
| Board of Directors | 1993 – 1993 |
| Chairman | 2005 – 2009 |