Year annual % 1960 1.43879470321092 1961 1.84539787448658 1962 4.31599287754389 1963 3.44021288042955 1964 3.08055687101806 1965 3.4144786084618 1966 4.77597959563696 1967 4.00519621563871 1968 2.39582226957016 1969 2.48903598959377 1970 3.61598678629518 1971 6.57322111925795 1972 6.66000704160239 1973 8.75467033024639 1974 9.76741431913024 1975 6.6965952250783 1976 1.71547632285655 1977 1.29599916278321 1978 1.02879289487425 1979 3.64764010558785 1980 4.02250084839003 1981 6.49030964005719 1982 5.65510182392343 1983 2.94979443545723 1984 2.93145669136625 1985 3.43539935298269 1986 0.750309839410783 1987 1.44032188041722 1988 1.87246859731873 1989 3.15526979710908 1990 5.4039590921894 1991 5.8595966346867 1992 4.03703020778739 1993 3.29262180313611 1994 0.8521169951207 1995 1.79982776867144 1996 0.811634064628211 1997 0.520225422736652 1998 0.0179384378439098 1999 0.806444380959449 2000 1.5585291967901 2001 0.989020329832546 2002 0.642711506543278 2003 0.638272930887201 2004 0.802908730955227 2005 1.17195420333703 2006 1.05950928324802 2007 0.732350603122248 2008 2.42604117060158 2009 -0.480481936423275 2010 0.688238707220026 2011 0.2313492076509 2012 -0.692552018105253 2013 -0.217323155115693 2014 -0.0132025387514939 2015 -1.14390867228183 2016 -0.434618664285835 2017 0.533787839825897 2018 0.936335464113563 2019 0.362886179940614 2020 -0.725874933313384 2021 0.581814168489856 2022 2.83502798644463 2023 2.13540088016377