| Former (21) |
| Board of Directors | 1997 – 1997 |
| Board of Directors | 2018 – 2019 |
| Board of Directors | 1997 – 1999 |
| Chairman | 2018 – 2019 |
| Board of Directors | 2004 – 2007 |
| Chairman | 1999 – 1999 |
| Chairman | 2011 – 2015 |
| Board of Directors | 1997 – 1999 |
| Chairman | 2007 – 2011 |
| Board of Directors | 1999 – 2004 |
| Board of Directors | 1999 – 1999 |
| Board of Directors | 2015 – 2018 |
| Chairman | 2015 – 2015 |
| Chairman | 2015 – 2018 |
| Chairman | 1997 – 1997 |
| Chairman | 1999 – 2007 |
| Board of Directors | 2018 – 2019 |
| Board of Directors | 2001 – 2001 |
| Board of Directors | 1999 – 2001 |
| Board of Directors | 2007 – 2011 |
| Deputy Chairman | 1999 – 2000 |