| 0 | 16 |
| 1965 | 1 |
| 1967 | 1 |
| 1968 | 3 |
| 1969 | 3 |
| 1970 | 8 |
| 1971 | 9 |
| 1972 | 13 |
| 1973 | 28 |
| 1974 | 29 |
| 1975 | 40 |
| 1976 | 29 |
| 1977 | 42 |
| 1978 | 42 |
| 1979 | 46 |
| 1980 | 62 |
| 1981 | 72 |
| 1982 | 67 |
| 1983 | 106 |
| 1984 | 109 |
| 1985 | 131 |
| 1986 | 150 |
| 1987 | 121 |
| 1988 | 165 |
| 1989 | 163 |
| 1990 | 124 |
| 1991 | 146 |
| 1992 | 169 |
| 1993 | 138 |
| 1994 | 186 |
| 1995 | 197 |
| 1996 | 169 |
| 1997 | 163 |
| 1998 | 310 |
| 1999 | 282 |
| 2000 | 310 |
| 2001 | 347 |
| 2002 | 319 |
| 2003 | 419 |
| 2004 | 452 |
| 2005 | 420 |
| 2006 | 492 |
| 2007 | 625 |
| 2008 | 470 |
| 2009 | 439 |
| 2010 | 478 |
| 2011 | 488 |
| 2012 | 455 |
| 2013 | 569 |
| 2014 | 590 |
| 2015 | 572 |
| 2016 | 561 |
| 2017 | 484 |
| 2018 | 478 |
| 2019 | 565 |
| 2020 | 486 |
| 2021 | 514 |
| 2022 | 597 |
| 2023 | 508 |
| 2024 | 257 |
| 9999 | 10 |