time 0
1955 -999.9
1956 2.5
1957 20.8
1958 6.1
1959 28.0
1960 2.8
1961 -999.9
1962 0.2
1963 10.9
1964 8.8
1965 12.3
1966 17.6
1967 15.8
1968 25.1
1969 33.2
1970 14.1
1971 -999.9
1972 9.2
1973 26.8
1974 29.6
1975 16.5
1976 27.4
1977 19.0
1978 35.2
1979 8.4
1980 3.5
1981 13.4
1982 18.8
1983 16.9
1984 54.4
1985 12.5
1986 -999.9
1987 11.7
1988 -999.9
1989 21.1
1990 10.4
1991 12.9
1992 1.4
1993 -999.9
1994 19.3
1995 18.4
1996 53.3
1997 22.9
1998 49.6
1999 12.6
2000 30.1
2001 17.0
2002 -999.9
2003 25.9
2004 34.0
2005 25.6
2006 7.5
2007 1.7
2008 36.8
2009 14.4
2010 15.8
2011 16.1
2012 39.0
2013 54.7
2014 29.5
2015 9.7
2016 11.3
2017 43.2
2018 38.5
2019 22.4
2020 39.7
2021 25.1
2022 84.5