| Year | Rank | Trend | +/- | Quantity |
|---|---|---|---|---|
| 2013 | 686 | -68 | 345 | |
| 2012 | 618 | -15 | 392 | |
| 2011 | 603 | -52 | 406 | |
| 2010 | 551 | -45 | 457 | |
| 2009 | 506 | -30 | 533 | |
| 2008 | 476 | -22 | 583 | |
| 2007 | 454 | -15 | 608 | |
| 2006 | 439 | -5 | 620 | |
| 2005 | 434 | -28 | 615 | |
| 2004 | 406 | +22 | 639 | |
| 2003 | 428 | -23 | 595 | |
| 2002 | 405 | -3 | 626 | |
| 2001 | 402 | -11 | 620 | |
| 2000 | 391 | -3 | 651 | |
| 1999 | 388 | -19 | 664 | |
| 1998 | 369 | +13 | 693 | |
| 1997 | 382 | -30 | 632 | |
| 1996 | 352 | +30 | 691 | |
| 1995 | 382 | -24 | 621 | |
| 1994 | 358 | +2 | 674 | |
| 1993 | 360 | +1 | 655 | |
| 1992 | 361 | +27 | 655 | |
| 1991 | 388 | +7 | 583 | |
| 1990 | 395 | +9 | 586 | |
| 1989 | 404 | -17 | 530 | |
| 1988 | 387 | +64 | 510 | |
| 1987 | 451 | -22 | 388 | |
| 1986 | 429 | -20 | 404 | |
| 1985 | 409 | -5 | 430 | |
| 1984 | 404 | -10 | 412 | |
| 1983 | 394 | -6 | 421 | |
| 1982 | 388 | +4 | 435 | |
| 1981 | 392 | +18 | 427 | |
| 1980 | 410 | -9 | 395 | |
| 1979 | 401 | +42 | 393 | |
| 1978 | 443 | -23 | 320 | |
| 1977 | 420 | -9 | 351 | |
| 1976 | 411 | +5 | 357 | |
| 1975 | 416 | +3 | 350 | |
| 1974 | 419 | 0 | 348 | |
| 1973 | 419 | +49 | 346 | |
| 1972 | 468 | -6 | 281 | |
| 1971 | 462 | +10 | 313 | |
| 1970 | 472 | +23 | 290 | |
| 1969 | 495 | -45 | 244 | |
| 1968 | 450 | +34 | 292 | |
| 1967 | 484 | +69 | 242 | |
| 1966 | 553 | -14 | 192 | |
| 1965 | 539 | +34 | 202 | |
| 1964 | 573 | -6 | 191 | |
| 1963 | 567 | +9 | 194 | |
| 1962 | 576 | +31 | 185 | |
| 1961 | 607 | -42 | 170 | |
| 1960 | 565 | +15 | 192 | |
| 1959 | 580 | +23 | 184 | |
| 1958 | 603 | +5 | 163 | |
| 1957 | 608 | -27 | 160 | |
| 1956 | 581 | +21 | 171 | |
| 1955 | 602 | +6 | 150 | |
| 1954 | 608 | +30 | 148 | |
| 1953 | 638 | -31 | 125 | |
| 1952 | 607 | +4 | 136 | |
| 1951 | 611 | -6 | 132 | |
| 1950 | 605 | -27 | 128 | |
| 1949 | 578 | -3 | 135 | |
| 1948 | 575 | +74 | 135 | |
| 1947 | 649 | +22 | 113 | |
| 1946 | 671 | -46 | 93 | |
| 1945 | 625 | +84 | 94 | |
| 1944 | 709 | +15 | 77 | |
| 1943 | 724 | +190 | 79 | |
| 1942 | 914 | -267 | 53 | |
| 1941 | 647 | +73 | 88 | |
| 1940 | 720 | +45 | 72 | |
| 1939 | 765 | -34 | 63 | |
| 1938 | 731 | +8 | 70 | |
| 1937 | 739 | -76 | 68 | |
| 1936 | 663 | +57 | 79 | |
| 1935 | 720 | -69 | 72 | |
| 1934 | 651 | +47 | 86 | |
| 1933 | 698 | +43 | 74 | |
| 1932 | 741 | -155 | 71 | |
| 1931 | 586 | +25 | 100 | |
| 1930 | 611 | +19 | 101 | |
| 1929 | 630 | +46 | 94 | |
| 1928 | 676 | -47 | 87 | |
| 1927 | 629 | -23 | 100 | |
| 1926 | 606 | +82 | 107 | |
| 1925 | 688 | +19 | 88 | |
| 1924 | 707 | -24 | 87 | |
| 1923 | 683 | +241 | 89 | |
| 1922 | 924 | 57 | ||
| 1921 | ||||
| 1920 | 812 | 68 | ||
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| 1910 | 895 | 13 | ||
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| 1905 | 812 | -32 | 10 | |
| 1904 | 780 | 10 | ||
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| 1892 | 825 | 8 | ||
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