| Board of Directors | 2019 – 2019 |
| Board of Directors | 1992 – 2003 |
| Board of Directors | 1992 – 1996 |
| Chairman | 2018 – 2019 |
| Chairman | 2013 – 2018 |
| Board of Directors | 1992 – 2001 |
| Chairman | 2019 – 2019 |
| Board of Directors | 1992 – 2001 |
| Board of Directors | 2014 – 2018 |
| Board of Directors | 1992 – 2011 |
| Board of Directors | 2003 – 2009 |
| Board of Directors | 2018 – 2019 |
| Board of Directors | 1992 – 2018 |
| Board of Directors | 2010 – 2018 |
| Chairman | 2011 – 2013 |