| Current (3) |
| Board of Directors | 2022 |
| Chairman | 2018 |
| Deputy Chairman | 2018 |
| Former (14) |
| Chairman | 2010 – 2016 |
| Chairman | 1999 – 2002 |
| Board of Directors | 2000 – 2005 |
| Board of Directors | 1994 – 2008 |
| Board of Directors | 2005 – 2007 |
| Chairman | 2002 – 2007 |
| Chairman | 2016 – 2018 |
| Board of Directors | 1945 – 2000 |
| Board of Directors | 2008 – 2016 |
| Board of Directors | 2009 – 2015 |
| Chairman | 2007 – 2010 |
| Chairman | 1994 – 1999 |
| Board of Directors | 1994 – 2009 |
| Board of Directors | 1994 – 1995 |