| Board of Directors | 1998 – 2009 |
| Board of Directors | 2016 – 2021 |
| Chairman | 2021 – 2022 |
| Board of Directors | 2016 – 2017 |
| Board of Directors | 2018 – 2018 |
| Board of Directors | 2009 – 2016 |
| Board of Directors | 1985 – 1991 |
| Chairman | 1998 – 2009 |
| Board of Directors | 1998 – 2002 |
| Chairman | 1985 – 1997 |
| Board of Directors | 2004 – 2009 |
| Board of Directors | 1985 – 1998 |
| Board of Directors | 1985 – 1998 |
| Board of Directors | 2012 – 2016 |
| Chairman | 2009 – 2012 |
| Board of Directors | 2018 – 2021 |
| Chairman | 2012 – 2021 |
| Board of Directors | 2022 – 2022 |
| Board of Directors | 2009 – 2009 |
| Board of Directors | 2009 – 2013 |
| Board of Directors | 2021 – 2022 |
| Chairman | 2022 – 2022 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 1985 – 1998 |