| Current (3) |
| Board of Directors | 2023 |
| Chairman | 2019 |
| Board of Directors | 2014 |
| Former (15) |
| Board of Directors | 1996 – 2003 |
| Board of Directors | 2004 – 2007 |
| Chairman | 2017 – 2019 |
| Board of Directors | 1997 – 2003 |
| Board of Directors | 2010 – 2014 |
| Board of Directors | 1985 – 2007 |
| Board of Directors | 1996 – 2007 |
| Board of Directors | 2007 – 2014 |
| Chairman | 2007 – 2014 |
| Board of Directors | 1985 – 1996 |
| Chairman | 2014 – 2017 |
| Board of Directors | 2014 – 2023 |
| Board of Directors | 2007 – 2010 |
| Board of Directors | 1985 – 1996 |
| Board of Directors | 1985 – 2007 |