Year annual % 1961 13.273001508295627 1962 -0.044385264092321346 1963 16.651865008880996 1964 -2.893033878949372 1965 3.3320266562132494 1966 11.836115326251896 1967 6.953867028493894 1968 14.779575007928958 1969 14.70019342359768 1970 17.706576728499158 1971 24.00736799017601 1972 19.31011718105298 1973 13.819338774380965 1974 30.35974720466699 1975 29.43315308595935 1976 34.2145069509472 1977 26.646272741909517 1978 24.637681159420293 1979 29.732762137902895 1980 12.637261839243127 1981 27.785662765536657 1982 34.64612807487118 1983 7.287454867543848 1984 5.146335929819254 1985 1.219117488402201 1986 -2.7345507946659087 1987 3.465280229882258 1988 0.6072374227714034 1989 6.370261197085074 1990 6.244982790283383 1991 2.529601722282024 1992 -6.905915606703009 1993 15.253906461792038 1994 16.65976704363698 1995 3.959094465010122 1996 23.194149982156986 1997 11.329173896738306 1998 14.490621154698314 1999 4.233545516503881 2000 11.689083508336848 2001 13.816160330386978 2002 1.4519628186974105 2003 0.38961190813470625 2004 19.198255456818618 2005 26.691762606354718 2006 19.73430999321867 2007 11.607386998217684 2008 16.437768802994242 2009 17.253460784529707 2010 1.0172023892791293 2011 0.7894323609699402 2012 20.832428303638544 2013 3.207418428816528 2014 7.195014921547541 2015 1.1328275541791564 2016 2.7896000024117957 2017 -0.3604567891406694 2018 1.1734697200810664 2019 2.883156966816397 2020 7.12486920321094 2021 1.6777392279486354 2022 1.8669943102849262 2023 1.382847972725032