| Current (2) |
| Chairman | 2019 |
| Board of Directors | 2020 |
| Former (15) |
| Chairman | 2013 – 2015 |
| Board of Directors | 2015 – 2017 |
| Board of Directors | 2007 – 2013 |
| Board of Directors | 2004 – 2007 |
| Board of Directors | 2013 – 2015 |
| Board of Directors | 2017 – 2018 |
| Board of Directors | 2002 – 2002 |
| Chairman | 2015 – 2019 |
| Board of Directors | 2009 – 2011 |
| Board of Directors | 2019 – 2020 |
| Board of Directors | 2002 – 2004 |
| Board of Directors | 2013 – 2014 |
| Board of Directors | 2019 – 2020 |
| Chairman | 2002 – 2009 |
| Board of Directors | 2002 – 2002 |
