1937-1943[]
1943-1946[]
1946-1956[]
1956-1968[]
1968[]
1969-1985[]
1985-1997[]
50th Anniversary (1987)
55th Anniversary (1992)
57th Anniversary (1994)
58th Anniversary (1995)
59th Anniversary (1996)
60th Anniversary (1997)
1997-2007[]
71th Anniversary (1998)
65th Anniversary logo (2002)
66th Anniversary logo (2003)
68th Anniversary logo (2005)
2007-present[]
70th Anniversary logo (2007)
71th Anniversary logo (2008)
71th Anniversary logo (2009)
73th Anniversary logo (2010)
74th Anniversary logo (2011)
75th Anniversary logo (2012)