     |
Yellow
October 1946 to May 1985 |
 |
Grey
June to September 1985 |
 |
Yellow
October 1985 to May 1986 |
 |
Grey
June 1986 to June 1988 |
 |
Green
June 1988 to February 1989 |
 |
Blue
March to November 1989 |
 |
Yellow
March 1990 to May 1991 |
 |
Blue
May to June 1991 |
    |
Yellow
September 1991 to February 1997 |
 |
Blue
March 1997 to April 1998 |
 |
Green
May 1998 |
 |
Blue
June 1998 to March 1999 |
 |
Yellow
April 1999 to November 2000 |
 |
Black
February 2001 to June 2002 |
   |
Blue/Purple
September 2002 to February 2009 |
   |
 |
Green
March to November 2009 |
 |
Yellow
March to May 2010 |
 |
Green
June to August 2010 |
 |
Black
September 2010 to June 2011 |
 |
Green
September to November 2011 |
 |
Red
February 2012 to March 2013 |
  |
Yellow/Gold
May 2013 to June 2014 |
 |
Green
June 2014 to November 2015 |
|
Black
March to October 2016 |
 |
Blue
November 2016 to November 2017 |
   |
Yellow/Gold
March 2018 to December 2022 |
|
Blue
2023 |
|
Orange
March 2024 |