| year | # | front | back | |
| 1967 | 1 |
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| 1968 | 2 |
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| 1969 | 3 |
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| 1970 | 4 |
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| 1971 | 5 |
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| 1972 | 6 |
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| 1973 | 7 | |||
| 1974 | 8 | |||
| 1975 | 9 |
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| 1976 | 10 |
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| 1977 | 11 |
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| 1978 | 12 |
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| 1979 | 13 |
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| 1980 | 14 |
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| 1981 | 15 |
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| 1982 | 16 |
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| 1983 | 17 | |||
| 1984 | 18 | |||
| 1985 | 19 |
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| 1986 | 20 |
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| 1987 | 21 | |||
| 1988 | 22 |
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| 1989 | 23 | |||
| 1990 | 24 |
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| 1991 | 25 |
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| 1992 | 26 |
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| 1993 | 27 | |||
| 1994 | 28 | |||
| 1995 | 29 |
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| 1996 | 30 |
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| 1996 | 30 |
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| 1997 | 31 | |||
| 1998 | 32 |
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| 1999 | 33 |
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| 2000 | 34 |
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| 2001 | 35 | |||
| 2002 | 36 |
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| 2003 | 37 | |||
| 2004 | 38 |
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| 2005 | 39 | |||
| 2006 | 40 |
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| 2007 | 41 |
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| 2008 | 42 |
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| 2009 | 43 |
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| 2010 | 44 |
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| 2011 | 45 |
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| 2012 | 46 |
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| 2013 | 47 |
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| 2014 | 48 |
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| 2015 | 49 | |||
| 2016 | 50 |
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| 2017 | 51 |
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| 2018 | 52 |
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