| Year | Rank | +/- | Quantity | |
|---|---|---|---|---|
| 2010 | #72 | -18 | 3,683 | |
| 2009 | #54 | -2 | 4,789 | |
| 2008 | #52 | -7 | 5,167 | |
| 2007 | #45 | -1 | 5,504 | |
| 2006 | #44 | +3 | 5,742 | |
| 2005 | #47 | -1 | 5,564 | |
| 2004 | #46 | -3 | 5,705 | |
| 2003 | #43 | +9 | 5,964 | |
| 2002 | #52 | +5 | 5,335 | |
| 2001 | #57 | -6 | 5,211 | |
| 2000 | #51 | -4 | 5,640 | |
| 1999 | #47 | -1 | 6,066 | |
| 1998 | #46 | -1 | 6,344 | |
| 1997 | #45 | 0 | 6,672 | |
| 1996 | #45 | +7 | 6,723 | |
| 1995 | #52 | +2 | 6,371 | |
| 1994 | #54 | -2 | 5,976 | |
| 1993 | #52 | +7 | 6,158 | |
| 1992 | #59 | +6 | 5,770 | |
| 1991 | #65 | +5 | 5,551 | |
| 1990 | #70 | +4 | 4,989 | |
| 1989 | #74 | +13 | 4,148 | |
| 1988 | #87 | +7 | 3,411 | |
| 1987 | #94 | +10 | 2,958 | |
| 1986 | #104 | -2 | 2,693 | |
| 1985 | #102 | -3 | 2,726 | |
| 1984 | #99 | -3 | 2,745 | |
| 1983 | #96 | -4 | 2,861 | |
| 1982 | #92 | -40 | 3,149 | |
| 1981 | #52 | +5 | 5,329 | |
| 1980 | #57 | +28 | 4,952 | |
| 1979 | #85 | +30 | 3,512 | |
| 1978 | #115 | +35 | 2,529 | |
| 1977 | #150 | +24 | 1,870 | |
| 1976 | #174 | +34 | 1,465 | |
| 1975 | #208 | +52 | 1,180 | |
| 1974 | #260 | +42 | 964 | |
| 1973 | #302 | +19 | 771 | |
| 1972 | #321 | +26 | 735 | |
| 1971 | #347 | -2 | 726 | |
| 1970 | #345 | +138 | 758 | |
| 1969 | #483 | +44 | 401 | |
| 1968 | #527 | +58 | 328 | |
| 1967 | #585 | -23 | 268 | |
| 1966 | #562 | +260 | 286 | |
| 1965 | #822 | +105 | 146 | |
| 1964 | #927 | -72 | 128 | |
| 1963 | #855 | +69 | 150 | |
| 1962 | #924 | +64 | 132 | |
| 1961 | #988 | 120 | ||
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| 1954 | #966 | -170 | 101 | |
| 1953 | #796 | 134 | ||
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