Year annual % 1966 7.363823440089746 1967 0.9073824791663299 1968 0.3348088284425188 1969 6.735981183860076 1970 -0.9491325469326597 1971 -2.6606297758993236 1972 4.342739433263645 1973 0.7713206924699705 1974 3.9296922707608957 1975 -0.38211330019797174 1976 -4.361193487168563 1977 3.780579274226554 1978 8.200253798123896 1979 -7.620098614085151 1980 11.041781862496066 1981 -5.9674540190192005 1982 -8.001771129208805 1983 -8.776198576291407 1984 1.807039584281128 1985 2.523343958787464 1986 -0.7223668573936521 1987 -2.3086771134027373 1988 3.5714075185567538 1989 1.4033411449129574 1990 -2.605386263229832 1991 -3.3742967074926895 1992 -6.632087768173292 1993 -13.219803461461183 1994 11.12501837501236 1995 4.3754591547378965 1996 5.061084525522205 1997 10.734169288010037 1998 -4.930582893520381 1999 -1.0812610869823374 2000 -3.2321024876380875 2001 -1.877733186048232 2002 1.6157457656077838 2003 4.078563550975332 2004 -3.7963810486530605 2005 -7.086449319034983 2006 -0.2517647146006823 2007 -3.7455012472795346 2008 1.5405991659174276 2009 2.447359659890253 2010 2.976972504010348 2011 7.960217139559035 2012 -0.5469582920934357 2013 3.4653869390841407 2014 3.303160825897791 2015 4.473875249967989 2016 0.08598054192012228 2017 0.8277453972356028 2018 2.471557892493877 2019 2.4655353793252743 2020 -0.16603318853462667 2021 3.1522974383775875 2022 3.579798544971993 2023 3.939916946391236