| Year | Rank | +/- | Quantity | |
|---|---|---|---|---|
| 2010 | #49 | -14 | 5,021 | |
| 2009 | #35 | -7 | 5,816 | |
| 2008 | #28 | -2 | 6,810 | |
| 2007 | #26 | 0 | 7,564 | |
| 2006 | #26 | -1 | 8,212 | |
| 2005 | #25 | -7 | 8,604 | |
| 2004 | #18 | -2 | 9,757 | |
| 2003 | #16 | +3 | 10,942 | |
| 2002 | #19 | -2 | 11,299 | |
| 2001 | #17 | -4 | 11,882 | |
| 2000 | #13 | 0 | 13,309 | |
| 1999 | #13 | -1 | 13,287 | |
| 1998 | #12 | 0 | 13,420 | |
| 1997 | #12 | -1 | 13,882 | |
| 1996 | #11 | 0 | 15,269 | |
| 1995 | #11 | +1 | 16,082 | |
| 1994 | #12 | +4 | 15,885 | |
| 1993 | #16 | -3 | 15,448 | |
| 1992 | #13 | -1 | 16,517 | |
| 1991 | #12 | +2 | 18,540 | |
| 1990 | #14 | +6 | 17,534 | |
| 1989 | #20 | 0 | 14,903 | |
| 1988 | #20 | +7 | 13,427 | |
| 1987 | #27 | +37 | 10,575 | |
| 1986 | #64 | +44 | 4,658 | |
| 1985 | #108 | -8 | 2,606 | |
| 1984 | #100 | -19 | 2,681 | |
| 1983 | #81 | +52 | 3,524 | |
| 1982 | #133 | +448 | 2,275 | |
| 1981 | #581 | +13 | 318 | |
| 1980 | #594 | +81 | 313 | |
| 1979 | #675 | +3 | 255 | |
| 1978 | #678 | +15 | 236 | |
| 1977 | #693 | +32 | 226 | |
| 1976 | #725 | +40 | 202 | |
| 1975 | #765 | +2 | 185 | |
| 1974 | #767 | +97 | 181 | |
| 1973 | #864 | -100 | 149 | |
| 1972 | #764 | +68 | 182 | |
| 1971 | #832 | +17 | 166 | |
| 1970 | #849 | -124 | 159 | |
| 1969 | #725 | +140 | 193 | |
| 1968 | #865 | +28 | 140 | |
| 1967 | #893 | -65 | 132 | |
| 1966 | #828 | -9 | 145 | |
| 1965 | #819 | +3 | 147 | |
| 1964 | #822 | +15 | 163 | |
| 1963 | #837 | -24 | 156 | |
| 1962 | #813 | 166 | ||
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| 1960 | #935 | +53 | 130 | |
| 1959 | #988 | 115 | ||
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