| Board of Directors | 1998 – 2011 |
| Board of Directors | 2011 – 2013 |
| Board of Directors | 2002 – 2004 |
| Board of Directors | 2011 – 2013 |
| Board of Directors | 1975 – 1995 |
| Board of Directors | 2008 – 2011 |
| Board of Directors | 1995 – 2011 |
| Board of Directors | 1975 – 1998 |
| Board of Directors | 1975 – 1989 |
| Board of Directors | 2004 – 2011 |
| Board of Directors | 1975 – 2008 |
| Chairman | 2011 – 2013 |
| Chairman | 2002 – 2011 |
| Deputy Chairman | 2011 – 2013 |
| Board of Directors | 2011 – 2013 |