If the die itself has a date code, use that.  Failing that use the package code (YYWW).  If neither is availible feel free to make a guess and note the justification for the guess on the page

====== 60's ======

1960
{{topic>year_1960}}

1961
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1962
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1963
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1964
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1965
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1966
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1967
{{topic>year_1967}}

1968
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1969
{{topic>year_1969}}


====== 70's ======

1970
{{topic>year_1970}}

1971
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1972
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1973
{{topic>year_1973}}

1974
{{topic>year_1974}}

1975
{{topic>year_1975}}

1976
{{topic>year_1976}}

1977
{{topic>year_1977}}

1978
{{topic>year_1978}}

1979
{{topic>year_1979}}

====== 80's ======

1980
{{topic>year_1980}}

1981
{{topic>year_1981}}

1982
{{topic>year_1982}}

1983
{{topic>year_1983}}

1984
{{topic>year_1984}}

1985
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1986
{{topic>year_1986}}

1987
{{topic>year_1987}}

1988
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1989
{{topic>year_1989}}


====== 90's ======

1990
{{topic>year_1990}}

1991
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1992
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1993
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1994
{{topic>year_1994}}

1995
{{topic>year_1995}}

1996
{{topic>year_1996}}

1997
{{topic>year_1997}}

1998
{{topic>year_1998}}

1999
{{topic>year_1999}}


====== 00's ======

2000
{{topic>year_2000}}

2001
{{topic>year_2001}}

2002
{{topic>year_2002}}

2003
{{topic>year_2003}}

2004
{{topic>year_2004}}

2005
{{topic>year_2005}}

2006
{{topic>year_2006}}

2007
{{topic>year_2007}}

2008
{{topic>year_2008}}

2009
{{topic>year_2009}}


====== 10's ======

2010
{{topic>year_2010}}

2011
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2012
{{topic>year_2012}}

2013
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2014
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2015
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2016
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2017
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2018
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2019
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====== Tagged as unknown ======

{{topic>year_unknown}}