Year annual % growth 1971 5.336912189984133 1972 11.253356046381512 1973 4.640398307097911 1974 -2.265587586601498 1975 -11.114226428742853 1976 19.55351107881367 1977 10.932214313628293 1978 8.667066874711793 1979 1.662645328579842 1980 -6.656124089555888 1981 2.6114987216520547 1982 -1.2726515286968407 1983 12.618985771458895 1984 24.343096530129486 1985 6.48959257929593 1986 8.529281920861777 1987 5.942751355914396 1988 3.9280807426794695 1989 4.4036943199852345 1990 3.577068708330188 1991 -0.14951756160900231 1992 7.009818363168719 1993 8.64659088135096 1994 11.92835397616004 1995 8.00088770313954 1996 8.69643653711816 1997 13.467440024480211 1998 11.688740245380785 1999 11.59421977369621 2000 12.999548783194697 2001 -2.4613168770826803 2002 3.669427332761032 2003 5.1244901050762905 2004 10.98146758818379 2005 6.491207075336348 2006 6.420254879481234 2007 2.563232755666462 2008 -2.147047704091051 2009 -12.627531657124464 2010 12.969087940017303 2011 4.8160929732177635 2012 2.4483696501064856 2013 1.213003743895129 2014 5.160977387708314 2015 5.190803660732797 2016 1.456628044517558 2017 4.710078143742891 2018 4.03784430832863 2019 1.1972935990720401 2020 -9.014446535369018 2021 14.472465057481301 2022 8.584107930334639