time 0 1955 79.0 1956 78.0 1957 87.0 1958 95.0 1959 147.0 1960 26.0 1961 51.0 1962 74.0 1963 69.0 1964 129.0 1965 99.0 1966 68.0 1967 120.0 1968 123.0 1969 142.0 1970 125.0 1971 239.0 1972 118.0 1973 191.0 1974 194.0 1975 98.0 1976 432.0 1977 146.0 1978 272.0 1979 51.0 1980 108.0 1981 108.0 1982 88.0 1983 73.0 1984 199.0 1985 73.0 1986 122.0 1987 47.0 1988 409.0 1989 81.0 1990 368.0 1991 96.0 1992 76.0 1993 124.0 1994 86.0 1995 175.0 1996 109.0 1997 198.0 1998 159.0 1999 99.0 2000 107.0 2001 107.0 2002 74.0 2003 179.0 2004 290.0 2005 101.0 2006 114.0 2007 122.0 2008 72.0 2009 110.0 2010 147.0 2011 117.0 2012 113.0 2013 198.0 2014 188.0 2015 115.0 2016 65.0 2017 174.0 2018 141.0 2019 135.0 2020 129.0 2021 107.0 2022 313.0