Statistics
| Year | Singing | |
|---|---|---|
| Not available | 12 | - |
| 1941 | 2 | - |
| 1950 | 1 | - |
| 1952 | 4 | - |
| 1953 | 4 | - |
| 1954 | 3 | - |
| 1955 | 8 | - |
| 1956 | 9 | - |
| 1957 | 2 | - |
| 1958 | 3 | - |
| 1959 | 3 | - |
| 1960 | 10 | - |
| 1961 | 20 | - |
| 1962 | 16 | - |
| 1963 | 11 | - |
| 1964 | 22 | - |
| 1965 | 22 | - |
| 1966 | 16 | - |
| 1967 | 15 | - |
| 1968 | 13 | - |
| 1969 | 13 | - |
| 1970 | 12 | - |
| 1971 | 22 | - |
| 1972 | 21 | - |
| 1973 | 31 | - |
| 1974 | 33 | - |
| 1975 | 44 | - |
| 1976 | 36 | - |
| 1977 | 53 | - |
| 1978 | 51 | - |
| 1979 | 41 | - |
| 1980 | 49 | - |
| 1981 | 45 | - |
| 1982 | 69 | - |
| 1983 | 44 | - |
| 1984 | 46 | - |
| 1985 | 70 | - |
| 1986 | 61 | - |
| 1987 | 25 | - |
| 1988 | 25 | - |
| 1989 | 27 | - |
| 1990 | 42 | - |
| 1991 | 40 | - |
| 1992 | 38 | - |
| 1993 | 31 | - |
| 1994 | 43 | - |
| 1995 | 40 | - |
| 1996 | 26 | - |
| 1997 | 35 | - |
| 1998 | 28 | - |
| 1999 | 16 | - |
| 2000 | 30 | - |
| 2001 | 22 | - |
| 2002 | 17 | - |
| 2003 | 18 | - |
| 2004 | 19 | - |
| 2005 | 20 | - |
| 2006 | 25 | - |
| 2007 | 14 | - |
| 2008 | 23 | - |
| 2009 | 19 | - |
| 2010 | 12 | - |
| 2011 | 10 | - |
| 2012 | 2 | - |
| 2013 | 6 | - |
| 2014 | 4 | - |
| 2015 | 4 | - |
| 2016 | 7 | - |
| 2017 | 13 | - |
| 2018 | 10 | - |