Year annual % growth 1971 -1.931142224940828 1972 9.338634094367706 1973 21.320721753584834 1974 13.277849613971497 1975 -21.596399306394815 1976 -1.5026177753773453 1977 1.1998668066367344 1978 1.6344853974028268 1979 12.532284175632043 1980 -6.893742653083706 1981 10.97503252182932 1982 1.454779947966017 1983 -0.7911335007373026 1984 11.534358622552915 1985 1.525690671720838 1986 2.0309390265966982 1987 8.664565348520298 1988 0.18955689061516523 1989 15.800854290410513 1990 1.279057871638372 1991 -3.701142250930886 1992 7.423536653243048 1993 7.124400061667814 1994 14.295219319315208 1995 6.295490087263559 1996 6.326600275454069 1997 0.933737025838127 1998 3.1389542328561504 1999 9.244713170394931 2000 1.1183131830319013 2001 4.272596189651495 2002 7.357284584750019 2003 13.165925959095944 2004 13.364717179283488 2005 4.870059449101348 2006 -1.6712839641524084 2007 10.546018153159167 2008 -3.165724670055752 2009 -9.35904953731415 2010 11.494543343287972 2011 6.572992781647486 2012 1.326663464709796 2013 8.127660601727086 2014 7.4194375785592115 2015 2.2739933260023832 2016 5.192098033230124 2017 7.22695011939507 2018 3.938833708050282 2019 1.035420700694317 2020 -15.909274683069668 2021 17.332549995265055 2022 4.666425692839866