Statistics
| Year | Singing | |
|---|---|---|
| 1960 | 2 | - |
| 1961 | 6 | - |
| 1962 | 13 | - |
| 1963 | 26 | - |
| 1964 | 30 | - |
| 1965 | 31 | - |
| 1966 | 25 | - |
| 1967 | 31 | - |
| 1968 | 34 | - |
| 1969 | 36 | - |
| 1970 | 39 | - |
| 1971 | 22 | - |
| 1972 | 40 | - |
| 1973 | 43 | - |
| 1974 | 28 | - |
| 1975 | 41 | - |
| 1976 | 39 | - |
| 1977 | 57 | - |
| 1978 | 58 | - |
| 1979 | 31 | - |
| 1980 | 24 | - |
| 1981 | 16 | - |
| 1982 | 33 | - |
| 1983 | 14 | - |
| 1984 | 19 | - |
| 1985 | 18 | - |
| 1986 | 7 | - |
| 1987 | 1 | - |
| 1988 | 4 | - |
| 1989 | 2 | - |
| 1990 | 6 | - |
| 1991 | 2 | - |
| 1992 | 1 | - |
| 1994 | 1 | - |
| 1995 | 2 | - |
| 1997 | 1 | - |
| 2003 | 1 | - |
| 2019 | 2 | - |