| Year | Count |
|---|---|
| 1916 | 8 |
| 1932 | 5 |
| 1990 | 6 |
| 1991 | 12 |
| 1992 | 5 |
| 1993 | 23 |
| 1994 | 62 |
| 1995 | 66 |
| 1996 | 108 |
| 1997 | 153 |
| 1998 | 242 |
| 1999 | 237 |
| 2000 | 323 |
| 2001 | 389 |
| 2002 | 432 |
| 2003 | 604 |
| 2004 | 798 |
| 2005 | 854 |
| 2006 | 1,005 |
| 2007 | 992 |
| 2008 | 1,324 |
| 2009 | 1,680 |
| 2010 | 3,195 |
| 2011 | 4,660 |
| 2012 | 5 |
| 2012 | 5,179 |
| 2013 | 10 |
| 2013 | 5,948 |
| 2014 | 13 |
| 2014 | 6,117 |
| 2015 | 29 |
| 2015 | 7,491 |
| 2016 | 10 |
| 2016 | 8,030 |
| 2017 | 5 |
| 2017 | 8,079 |
| 2018 | 5 |
| 2018 | 7,483 |
| 2019 | 6,585 |
| 2020 | 5 |
| 2020 | 5,414 |
| 2021 | 5,930 |
| 2022 | 5,150 |
| 2023 | 4,213 |
| 2024 | 3,775 |