| Board of Directors | 1987 – 1990 |
| Board of Directors | 2018 – 2020 |
| Chairman | 2008 – 2009 |
| Board of Directors | 1987 – 1994 |
| Board of Directors | 2006 – 2016 |
| Board of Directors | 2016 – 2020 |
| Chairman | 2006 – 2008 |
| Deputy Chairman | 2006 – 2009 |
| Board of Directors | 1987 – 2006 |
| Board of Directors | 1987 – 1991 |
| Chairman | 1987 – 1994 |
| Board of Directors | 1987 – 2002 |
| Board of Directors | 2020 – 2021 |
| Board of Directors | 1987 – 1996 |
| Board of Directors | 1987 – 1994 |
| Board of Directors | 1987 – 1989 |
| Board of Directors | 1987 – 1994 |
| Board of Directors | 2011 – 2018 |
| Board of Directors | 2020 – 2021 |
| Chairman | 2011 – 2021 |
| Board of Directors | 1987 – 1994 |
| Chairman | 1987 – 1988 |
| Board of Directors | 2009 – 2011 |