| Current (2) |
| Board of Directors | 2023 |
| Chairman | 2023 |
| Former (19) |
| Board of Directors | 2010 – 2012 |
| Board of Directors | 1996 – 2007 |
| Chairman | 1991 – 2014 |
| Board of Directors | 2000 – 2010 |
| Board of Directors | 1991 – 1992 |
| Board of Directors | 2012 – 2014 |
| Board of Directors | 1998 – 2012 |
| Board of Directors | 2019 – 2020 |
| Board of Directors | 2014 – 2020 |
| Board of Directors | 2014 – 2019 |
| Chairman | 1991 – 1992 |
| Board of Directors | 2012 – 2013 |
| Board of Directors | 2007 – 2012 |
| Board of Directors | 2007 – 2014 |
| Board of Directors | 2008 – 2011 |
| Board of Directors | 1991 – 1994 |
| Board of Directors | 1991 – 2007 |
| Deputy Chairman | 2012 – 2014 |
| Chairman | 2020 – 2023 |