| Year | Count |
|---|---|
| 1960 | 5 |
| 1965 | 6 |
| 1967 | 11 |
| 1968 | 5 |
| 1969 | 5 |
| 1972 | 5 |
| 1988 | 5 |
| 1989 | 5 |
| 1993 | 5 |
| 1994 | 7 |
| 1995 | 6 |
| 1996 | 5 |
| 1997 | 10 |
| 1999 | 5 |
| 2000 | 5 |
| 2001 | 13 |
| 2002 | 12 |
| 2003 | 15 |
| 2004 | 27 |
| 2005 | 38 |
| 2006 | 41 |
| 2007 | 57 |
| 2008 | 68 |
| 2009 | 87 |
| 2010 | 88 |
| 2011 | 116 |
| 2012 | 134 |
| 2013 | 145 |
| 2014 | 190 |
| 2015 | 225 |
| 2016 | 305 |
| 2017 | 282 |
| 2018 | 250 |
| 2019 | 287 |
| 2020 | 378 |
| 2021 | 611 |
| 2022 | 883 |
| 2023 | 878 |
| 2024 | 1,008 |