| Current (2) |
| Board of Directors | 2021 |
| Chairman | 2023 |
| Former (23) |
| Board of Directors | 2008 – 2011 |
| Board of Directors | 1990 – 1991 |
| Chairman | 2006 – 2008 |
| Board of Directors | 2006 – 2008 |
| Board of Directors | 2013 – 2014 |
| Chairman | 2009 – 2010 |
| Board of Directors | 2016 – 2021 |
| Board of Directors | 2000 – 2006 |
| Board of Directors | 2008 – 2008 |
| Chairman | 2016 – 2016 |
| Deputy Chairman | 2006 – 2007 |
| Board of Directors | 2011 – 2013 |
| Chairman | 2016 – 2018 |
| Deputy Chairman | 2007 – 2008 |
| Board of Directors | 2008 – 2015 |
| Board of Directors | 2000 – 2006 |
| Chairman | 2006 – 2006 |
| Chairman | 2013 – 2016 |
| Chairman | 2010 – 2013 |
| Chairman | 2008 – 2009 |
| Board of Directors | 1990 – 2000 |
| Chairman | 2018 – 2021 |
| Chairman | 2021 – 2023 |