Year annual % 1961 1.09578967474124 1962 1.14315401418553 1963 1.32252564710048 1964 1.38220463805364 1965 0.976289383725576 1966 0.747873418831712 1967 0.961728386006623 1968 0.956732069447229 1969 0.782340328898866 1970 0.355759845018321 1971 0.364260163980666 1972 0.826716475011768 1973 0.908113632602921 1974 0.959785770177262 1975 0.99359553240035 1976 0.99779538250044 1977 0.963866722795674 1978 0.794064583275141 1979 0.802185476116554 1980 0.923267472012982 1981 0.90786848811038 1982 0.920284572106585 1983 0.937688926120541 1984 0.90459069212033 1985 0.803585474669463 1986 0.681065576626595 1987 0.564203449048717 1988 0.414457482867701 1989 0.361655504808961 1990 0.392398205207372 1991 0.354679168347882 1992 0.306681390812185 1993 0.254450913938076 1994 0.211012328819338 1995 0.13572103385363 1996 0.0760741823645528 1997 0.0654553694247315 1998 0.0357533013623718 1999 -0.0083027528251411 2000 -1.04433539837844 2001 -0.0275871247282958 2002 -0.0463189372499392 2003 -0.067492701646486 2004 -0.0585127351273288 2005 -0.043948953332248 2006 -0.0633705742926632 2007 -0.0543050208038707 2008 0.0136373796827091 2009 0.067763227021235 2010 -0.285609121534849 2011 0.0537697088781007 2012 -0.000239076003298365 2013 -0.0603600174744649 2014 -0.0748462292920506 2015 -0.0666411009657168 2016 -0.04298513087435 2017 0.0124800985844923 2018 -0.000200132782838419 2019 -0.0244271070993493 2020 -0.175062058196296 2021 -0.401728616642455 2022 -2.48206113275772 2023 -0.369758116260503