| Year | Count |
|---|---|
| 1922 | 5 |
| 1925 | 5 |
| 1926 | 9 |
| 1927 | 10 |
| 1928 | 6 |
| 1930 | 5 |
| 1931 | 7 |
| 1932 | 6 |
| 1933 | 5 |
| 1934 | 7 |
| 1935 | 7 |
| 1937 | 11 |
| 1939 | 6 |
| 1940 | 6 |
| 1955 | 5 |
| 1956 | 5 |
| 1957 | 8 |
| 1958 | 5 |
| 1960 | 6 |
| 1962 | 5 |
| 1963 | 5 |
| 1971 | 7 |
| 1981 | 5 |
| 1983 | 5 |
| 1984 | 21 |
| 1985 | 20 |
| 1987 | 44 |
| 1988 | 104 |
| 1989 | 416 |
| 1990 | 171 |
| 1991 | 20 |
| 1992 | 12 |
| 1993 | 7 |
| 2008 | 5 |
| 2011 | 10 |