| Year | Count |
|---|---|
| 1910 | 45 |
| 1911 | 51 |
| 1912 | 115 |
| 1913 | 90 |
| 1914 | 52 |
| 1915 | 170 |
| 1916 | 201 |
| 1917 | 139 |
| 1918 | 194 |
| 1919 | 186 |
| 1920 | 201 |
| 1921 | 174 |
| 1922 | 160 |
| 1923 | 104 |
| 1924 | 190 |
| 1925 | 143 |
| 1926 | 91 |
| 1927 | 94 |
| 1928 | 108 |
| 1929 | 132 |
| 1930 | 71 |
| 1931 | 66 |
| 1932 | 49 |
| 1933 | 51 |
| 1934 | 55 |
| 1935 | 7 |
| 1936 | 5 |
| 1937 | 41 |
| 1938 | 13 |
| 1939 | 15 |
| 1940 | 18 |
| 1941 | 38 |
| 1942 | 10 |
| 1943 | 19 |
| 1944 | 15 |
| 1947 | 5 |
| 1948 | 15 |
| 1949 | 27 |
| 1956 | 23 |
| 1958 | 5 |
| 1959 | 15 |
| 2007 | 5 |
| 2009 | 5 |
| 2011 | 25 |
| 2012 | 31 |
| 2013 | 38 |
| 2014 | 56 |
| 2015 | 96 |
| 2016 | 124 |
| 2017 | 292 |
| 2018 | 255 |
| 2019 | 282 |
| 2020 | 304 |
| 2021 | 291 |
| 2022 | 261 |
| 2023 | 238 |
| 2024 | 227 |