| Board of Directors | 1998 – 2004 |
| Board of Directors | 1998 – 1998 |
| Chairman | 2015 – 2020 |
| Board of Directors | 2019 – 2020 |
| Board of Directors | 2014 – 2016 |
| Board of Directors | 1998 – 2011 |
| Chairman | 2014 – 2015 |
| Board of Directors | 2015 – 2020 |
| Board of Directors | 2016 – 2019 |
| Board of Directors | 2004 – 2004 |
| Board of Directors | 1998 – 1998 |
| Chairman | 2004 – 2014 |
| Chairman | 1998 – 1998 |
| Board of Directors | 2012 – 2014 |
| Board of Directors | 2011 – 2013 |
| Board of Directors | 1998 – 2011 |