Year annual % 1961 -2.0412998238084157 1962 0.46961781889027066 1963 -2.347739957703311 1964 6.144011731984648 1965 2.704143295700902 1966 -3.7299665294153357 1967 0.5765616859590921 1968 3.8662067597644096 1969 5.08033311302232 1970 -12.053144236097495 1971 6.16325390450838 1972 13.453569506027094 1973 20.45065593897897 1974 12.853755268261494 1975 11.933753130803211 1976 -1.6679084910595918 1977 8.509999101420206 1978 2.4812257243757756 1979 15.180729932336632 1980 12.740934927816937 1981 6.599081152250136 1982 3.8587619818704297 1983 -10.501504680519886 1984 -16.594747728471745 1985 -17.016659023482944 1986 8.025883098776319 1987 7.189361313860346 1988 7.785116692513228 1989 0.7929328697466218 1990 -0.920431045366584 1991 -6.777300043158277 1992 -14.12965834164929 1993 -3.791122192125627 1994 -3.8956725619350294 1995 3.0385382555345757 1996 8.984383328406281 1997 -2.8790481379557775 1998 -27.048649270359903 1999 8.006813296561788 2000 0.6279000210355861 2001 -0.1308902116604287 2002 2.7129502947473156 2003 8.801275607063118 2004 7.611524316085777 2005 5.136601106633947 2006 -2.0176787072880984 2007 0.8948868233037928 2008 1.3492225294901488 2009 95.40865966795462 2010 2.575536019615882 2011 2.1717610318293623 2012 4.85594551850788 2013 8.091140249834524 2014 0.6249744851524639 2015 0.3674196527710336 2016 2.0140947343402615 2017 3.0569050621757015 2018 200.76957757965414 2019 225.3946482073967 2020 604.9458642280177 2021 113.29498064657275 2022 264.5806078164128 2023 860.498796936762