| Year | Count |
|---|---|
| 1924 | 10 |
| 1926 | 10 |
| 1927 | 12 |
| 1929 | 10 |
| 1945 | 5 |
| 1949 | 5 |
| 1951 | 6 |
| 1953 | 9 |
| 1958 | 18 |
| 1959 | 10 |
| 1960 | 14 |
| 1961 | 5 |
| 1962 | 7 |
| 1963 | 5 |
| 1965 | 5 |
| 1966 | 6 |
| 1969 | 10 |
| 1978 | 10 |
| 1981 | 5 |
| 1986 | 6 |
| 1988 | 5 |
| 1992 | 10 |
| 1993 | 5 |
| 1995 | 5 |
| 1996 | 5 |
| 2000 | 23 |
| 2001 | 5 |
| 2002 | 68 |
| 2003 | 272 |
| 2004 | 578 |
| 2005 | 732 |
| 2006 | 699 |
| 2007 | 852 |
| 2008 | 821 |
| 2009 | 1,132 |
| 2010 | 1,232 |
| 2011 | 1,490 |
| 2012 | 1,807 |
| 2013 | 2,004 |
| 2014 | 2,286 |
| 2015 | 2,523 |
| 2016 | 2,566 |
| 2017 | 2,630 |
| 2018 | 2,383 |
| 2019 | 2,306 |
| 2020 | 2,008 |
| 2021 | 2,148 |
| 2022 | 1,907 |
| 2023 | 1,748 |
| 2024 | 1,617 |