| June | July | August | September | |
|---|---|---|---|---|
| Total (50) | 1 | 24 | 22 | 5 |
| 1959 | - | 1 | 1 | 1 |
| 1960 | - | 1 | 1 | - |
| 1962 | - | 2 | - | - |
| 1964 | - | 3 | - | - |
| 1966 | - | - | 1 | - |
| 1970 | - | - | 1 | - |
| 1971 | - | - | 1 | - |
| 1972 | - | 1 | - | - |
| 1973 | - | 2 | 1 | - |
| 1979 | - | - | 1 | - |
| 1981 | - | 1 | - | 1 |
| 1982 | - | - | 1 | - |
| 1984 | - | 1 | 1 | - |
| 1985 | - | 1 | 2 | - |
| 1986 | - | - | 1 | - |
| 1987 | - | 1 | - | - |
| 1989 | - | - | - | 1 |
| 1990 | - | - | 1 | - |
| 1991 | - | - | 1 | - |
| 1992 | - | - | 1 | 1 |
| 1994 | - | 1 | 2 | - |
| 1995 | - | - | 1 | - |
| 1999 | - | 2 | - | 1 |
| 2000 | - | 1 | 1 | - |
| 2002 | - | 2 | - | - |
| 2006 | - | 1 | - | - |
| 2010 | - | - | 1 | - |
| 2011 | 1 | 1 | - | - |
| 2012 | - | - | 2 | - |
| 2014 | - | 1 | - | - |
| 2015 | - | 1 | - | - |
|
