Year annual % growth 1971 3.1050225730451047 1972 2.8740657642753575 1973 2.690523386340388 1974 3.1055960504973825 1975 4.717238357368103 1976 2.0471918846898234 1977 2.145936672557781 1978 3.263893395208541 1979 2.3350766358396555 1980 2.6284781072745744 1981 2.7806751024772325 1982 1.9996293282558213 1983 2.4397697943549588 1984 1.821095663969885 1985 3.1921212384491895 1986 3.040967655664261 1987 2.34544476203007 1988 2.1644127619092615 1989 2.1309510617169423 1990 2.918853302375652 1991 2.6539156409099576 1992 1.7783233248287047 1993 0.9958466455414197 1994 1.0630376979774638 1995 1.006085959772605 1996 1.3334398695328957 1997 1.4438112310242843 1998 2.0607228514645897 1999 2.6987674413401948 2000 2.3651119407123815 2001 2.93850756062875 2002 2.9707307624421446 2003 2.0320861852987804 2004 1.733083870784526 2005 1.4317320737041683 2006 1.85646878876544 2007 2.0066214630014088 2008 2.3497106427142143 2009 3.1989485579255756 2010 0.8867480972067909 2011 -0.5114286638187764 2012 0.17933513486170227 2013 0.01641868785236511 2014 0.7291674945343516 2015 1.7485313315186914 2016 2.062617102190984 2017 0.9485670675512381 2018 1.6111530613614349 2019 2.855095920541956 2020 1.4740117106188109 2021 3.6755532522125094 2022 1.1548101533510362