Year annual % 1961 5.81410742439013 1962 4.037101066854703 1963 11.248858934203554 1964 7.97677892316311 1965 7.920129780006519 1966 12.84441193026693 1967 10.421730528148672 1968 13.133534902686677 1969 14.109432111172922 1970 8.059292655915186 1971 8.973701222699688 1972 6.365459657152002 1973 14.42313527948049 1974 6.45393748348198 1975 4.448417072066533 1976 17.15929465563471 1977 13.855877143657438 1978 12.411483294890033 1979 7.714378331771044 1980 -5.6149439890661625 1981 5.544291860034761 1982 9.787191409141286 1983 14.005158815148661 1984 10.526550082088406 1985 6.818197774034303 1986 13.956982953826099 1987 14.937969177344115 1988 13.388421196079904 1989 8.759252616819381 1990 9.469277739038958 1991 10.918182154314948 1992 6.1295418139847015 1993 7.21481119311818 1994 9.38418458729278 1995 8.765054508625965 1996 6.65221946286681 1997 4.0487028824386755 1998 -7.67370844972875 1999 10.713136674673905 2000 6.471854411129584 2001 3.9634569307662275 2002 8.63125864700524 2003 2.6704583771858523 2004 4.298345971997435 2005 2.424434021752546 2006 3.984660721848684 2007 5.687270397988826 2008 0.38049013513570173 2009 2.477891504339283 2010 7.207676375638883 2011 1.627807293726974 2012 2.926159821714805 2013 3.844881621519008 2014 3.491671482674022 2015 6.315493683036124 2016 4.414400471955801 2017 3.2932341495054374 2018 1.5795913343290522 2019 0.3508650808433629 2020 0.056509357950758954 2021 3.491823259983164 2022 -0.6891965352211002 2023 1.8289942225549964