| Year | Count |
|---|---|
| 1913 | 6 |
| 1917 | 5 |
| 1918 | 8 |
| 1932 | 5 |
| 1953 | 5 |
| 1958 | 25 |
| 1961 | 5 |
| 1964 | 5 |
| 1971 | 5 |
| 1986 | 7 |
| 1987 | 5 |
| 1989 | 6 |
| 1990 | 5 |
| 1991 | 157 |
| 1992 | 134 |
| 1993 | 129 |
| 1994 | 305 |
| 1995 | 303 |
| 1996 | 335 |
| 1997 | 316 |
| 1998 | 445 |
| 1999 | 399 |
| 2000 | 337 |
| 2001 | 353 |
| 2002 | 400 |
| 2003 | 377 |
| 2004 | 5 |
| 2004 | 442 |
| 2005 | 521 |
| 2006 | 577 |
| 2007 | 475 |
| 2008 | 536 |
| 2009 | 476 |
| 2010 | 503 |
| 2011 | 517 |
| 2012 | 704 |
| 2013 | 869 |
| 2014 | 929 |
| 2015 | 1,074 |
| 2016 | 1,026 |
| 2017 | 877 |
| 2018 | 750 |
| 2019 | 708 |
| 2020 | 577 |
| 2021 | 698 |
| 2022 | 540 |
| 2023 | 502 |
| 2024 | 501 |