| Current (5) |
| Board of Directors | 2022 |
| Board of Directors | 2003 |
| Board of Directors | 2019 |
| Board of Directors | 2021 |
| Chairman | 2012 |
| Former (8) |
| Board of Directors | 2000 – 2007 |
| Board of Directors | 1982 – 1997 |
| Board of Directors | 1982 – 1994 |
| Board of Directors | 2007 – 2009 |
| Board of Directors | 1982 – 1995 |
| Board of Directors | 1982 – 2010 |
| Board of Directors | 1982 – 1997 |
| Board of Directors | 2020 – 2023 |