Year annual % 1961 1.0850992220620554 1962 -1.8369013322089671 1963 1.5853987144243575 1964 4.644986100283518 1965 -2.1120931585398495 1966 -0.8679052120095179 1967 1.703169546275717 1968 0.40622038981452135 1969 1.4248017031552394 1970 2.39445264328198 1971 -1.6531575268965355 1972 -3.211987035838632 1973 -3.7892710430043763 1974 -3.355326043109926 1975 1.229951882872541 1976 -0.6922707886097754 1977 2.0030488217771563 1978 5.140505534015432 1979 -3.605994735649716 1980 5.639699798623113 1981 0.696616102115442 1982 -1.9615593610899396 1983 4.464044710890306 1984 1.0702283620608313 1985 1.3214295287199462 1986 0.734941720577666 1987 1.01768666095235 1988 4.298255195908183 1989 1.3529905315716775 1990 2.5152143061182812 1991 -0.961362379959283 1992 2.3892211741630547 1993 1.5082622342066117 1994 2.185990063601338 1995 3.7923574823273185 1996 4.617004333702283 1997 0.9642407915816449 1998 2.9640893857430655 1999 4.054202418760553 2000 1.0085709946737325 2001 3.3841525098992093 2002 0.293816157182178 2003 3.3145258550976138 2004 3.878440436792445 2005 6.411715161486981 2006 2.852636515845603 2007 5.261028530673315 2008 2.3650369893822614 2009 2.4810384457951216 2010 4.216153831166338 2011 5.133409172881898 2012 3.6016373486513515 2013 4.952450412322705 2014 4.691714516093626 2015 5.634086781042541 2016 6.148637606345304 2017 4.790606581918013 2018 5.956240829051438 2019 4.001981478699037 2020 -5.234847441291976 2021 9.602532765964767 2022 5.7321360839307545 2023 1.7093101776492574