| Current (3) |
| Board of Directors | 2014 |
| Chairman | 2020 |
| Board of Directors | 2022 |
| Former (15) |
| Board of Directors | 2019 – 2022 |
| Chairman | 2011 – 2011 |
| Board of Directors | 2011 – 2014 |
| Chairman | 1996 – 2008 |
| Chairman | 1995 – 1996 |
| Board of Directors | 2006 – 2011 |
| Board of Directors | 1996 – 2006 |
| Board of Directors | 2008 – 2018 |
| Chairman | 2011 – 2012 |
| Board of Directors | 2004 – 2006 |
| Board of Directors | 2018 – 2019 |
| Board of Directors | 1996 – 2004 |
| Board of Directors | 1995 – 1996 |
| Chairman | 2008 – 2011 |
| Chairman | 2012 – 2020 |