Year annual % growth 1972 5.766042915468802 1973 7.612486957764091 1974 1.9833285602874042 1975 2.8016263385694202 1976 9.277689468564063 1977 13.61509745627363 1978 1.9052426139323444 1979 2.4017872552389576 1980 1.4340490472644518 1981 -0.28949955734820776 1982 -3.4056877933479086 1983 -3.132658451941168 1984 -0.39941292617317004 1985 -0.7244334412761333 1986 2.8251581506017374 1987 -0.591310542956009 1988 5.245851704795484 1989 4.247792725238469 1990 1.298007704657806 1991 7.517279593689224 1992 2.3819171678966455 1993 5.430629833930482 1994 4.521479847331705 1995 5.596798001530857 1996 1.3820335515816566 1997 5.589136846984033 1998 6.480856411383854 1999 2.5668582650103247 2000 1.6466427752728663 2001 -1.0968756332641476 2002 1.9979401938505816 2003 1.1435211113735875 2004 1.419988074325957 2005 1.712698560736186 2006 3.958025252693403 2007 5.250706052260767 2008 2.798442978763461 2009 2.510081264187903 2010 2.1547633161279123 2011 4.698644792928235 2012 4.29207947334919 2013 3.0630187248178657 2014 4.3009101128141225 2015 6.873520681094504 2016 2.63287210904069 2017 2.8414104350472655 2018 3.3943251359400506 2019 5.819720086376009 2020 -0.12648108907130506 2021 4.103626117357237