Statistics
| Year | Singing | |
|---|---|---|
| 1970 | 4 | - |
| 1971 | 2 | - |
| 1972 | 5 | - |
| 1973 | 5 | - |
| 1974 | 5 | - |
| 1975 | 17 | - |
| 1976 | 22 | - |
| 1977 | 20 | - |
| 1978 | 39 | - |
| 1979 | 25 | - |
| 1980 | 16 | - |
| 1981 | 9 | - |
| 1982 | 12 | - |
| 1983 | 5 | - |
| 1984 | 8 | - |
| 1985 | 5 | - |
| 1986 | 3 | - |
| 1987 | 1 | - |
| 1988 | 1 | - |
| 1989 | 3 | - |
| 1990 | 7 | - |
| 1991 | 2 | - |
| 1992 | 2 | - |
| 1994 | 1 | - |
| 1995 | 3 | - |
| 1996 | 1 | - |
| 1997 | 2 | - |
| 1998 | 1 | - |
| 1999 | 1 | - |
| 2002 | 1 | - |