| Year | Count |
|---|---|
| 1915 | 7 |
| 1916 | 6 |
| 1917 | 6 |
| 1918 | 14 |
| 1921 | 7 |
| 1922 | 7 |
| 1923 | 11 |
| 1924 | 8 |
| 1925 | 6 |
| 1926 | 6 |
| 1927 | 11 |
| 1928 | 11 |
| 1930 | 5 |
| 1931 | 7 |
| 1933 | 5 |
| 1934 | 5 |
| 1937 | 5 |
| 1944 | 5 |
| 1947 | 20 |
| 1948 | 5 |
| 1949 | 8 |
| 1952 | 5 |
| 1955 | 5 |
| 1959 | 10 |
| 1960 | 5 |
| 1962 | 14 |
| 1969 | 11 |
| 1972 | 5 |
| 1974 | 6 |
| 1975 | 7 |
| 1979 | 5 |
| 1980 | 8 |
| 1981 | 7 |
| 1984 | 6 |
| 1985 | 7 |
| 1986 | 5 |
| 1988 | 6 |
| 1989 | 7 |
| 1990 | 13 |
| 1991 | 8 |
| 1992 | 9 |
| 1994 | 6 |
| 1997 | 5 |
| 1998 | 11 |
| 1999 | 8 |
| 2000 | 21 |
| 2002 | 12 |
| 2004 | 6 |
| 2005 | 6 |
| 2006 | 10 |
| 2007 | 5 |
| 2008 | 26 |
| 2011 | 10 |
| 2012 | 12 |
| 2017 | 21 |
| 2018 | 9 |
| 2020 | 30 |
| 2021 | 22 |
| 2022 | 10 |
| 2023 | 18 |
| 2024 | 10 |