| Year | Count |
|---|---|
| 1910 | 6 |
| 1911 | 8 |
| 1912 | 10 |
| 1913 | 7 |
| 1914 | 7 |
| 1915 | 13 |
| 1916 | 7 |
| 1917 | 9 |
| 1918 | 5 |
| 1919 | 6 |
| 1926 | 7 |
| 1947 | 5 |
| 1975 | 5 |
| 1988 | 6 |
| 1990 | 5 |
| 1992 | 6 |
| 2000 | 7 |
| 2006 | 6 |
| 2007 | 5 |
| 2008 | 5 |
| 2012 | 7 |
| 2013 | 9 |
| 2014 | 5 |
| 2015 | 9 |
| 2016 | 20 |
| 2017 | 12 |
| 2018 | 14 |
| 2019 | 5 |
| 2020 | 11 |
| 2021 | 12 |
| 2022 | 13 |
| 2023 | 21 |
| 2024 | 16 |