Year annual % 1961 0.698142052204406 1962 0.778454921649097 1963 0.787727452841454 1964 0.799212891013953 1965 0.779239735049149 1966 0.803006033242491 1967 0.788419835109815 1968 0.608832365935992 1969 0.552993324651806 1970 0.751422718375473 1971 0.694895770618858 1972 0.571991415170235 1973 0.604488383151481 1974 0.465594010478141 1975 0.28826879589183 1976 0.251350791765536 1977 0.311445515827576 1978 0.310596092763269 1979 0.245630488836795 1980 0.121603620045595 1981 -0.0284052115613932 1982 -0.0734810004992979 1983 -0.0686662119157628 1984 -0.0523767271552282 1985 0.0405268892260381 1986 0.133727781435023 1987 0.126664340279044 1988 0.0485933862498549 1989 0.0599876651546732 1990 0.162456320242469 1991 0.259518212115074 1992 0.330671401713551 1993 0.333166395661953 1994 0.337707376243322 1995 0.520962181078711 1996 0.565926341934592 1997 0.415564969331455 1998 0.363162523600756 1999 0.330886246186545 2000 0.334233618829261 2001 0.358315678955486 2002 0.319487125340996 2003 0.272010444031566 2004 0.258432282052875 2005 0.275481733409308 2006 0.328645158919929 2007 0.443466054321374 2008 0.587547590258978 2009 0.535079062079429 2010 0.444197154509531 2011 0.411737855195019 2012 0.376272242619955 2013 0.416901360752097 2014 0.507053283010163 2015 0.706423849687002 2016 0.780392644135167 2017 0.643350903737356 2018 0.495838925879129 2019 0.358130915892652 2020 0.291641177476633 2021 0.433414489409722 2022 0.787502464739957 2023 0.741185515720057