Year annual % growth 1966 5.620932723875342 1967 9.531219325358833 1968 -1.159775500160407 1969 -4.047704274802385 1970 20.20860342574335 1971 -4.4972596990955225 1972 -8.772146178631061 1973 -5.971441827409336 1974 3.5173975225595484 1975 3.78344413930229 1976 5.700545127237675 1977 11.418530027457322 1978 3.117559387922199 1979 13.383613976799523 1980 8.497095959242301 1981 -1.3725085900153147 1982 -2.9372670773598912 1983 5.40706390479275 1984 0.79489602816966 1985 3.2116344431885437 1986 3.1796113448274212 1987 1.9395847976514347 1988 5.929163082442429 1989 5.700347955629283 1990 3.9517133704968614 1991 0.18591785750099632 1992 14.296971552621287 1993 13.817794723008262 1994 7.791960847563999 1995 13.99357359640878 1996 5.113611506672115 1997 7.810947163283231 1998 5.680525411836726 1999 3.6704251225820457 2000 4.923461642173237 2001 5.746857504690524 2002 5.524797619079266 2003 9.261959316656714 2004 15.672206600403896 2005 19.927555783579052 2006 13.545854134021099 2007 11.927945582282632 2008 15.500028125132587 2009 -4.234779447242133 2010 10.582016401615306 2011 12.57922856457867 2012 6.460149872272552 2013 -0.6124616388005393 2014 3.1036389031594354 2015 0.8565831220383728 2016 5.254481665972847 2017 15.577944877658581 2018 9.216099827262994 2019 0.6352061285458177 2020 -11.660037064787161 2021 16.328651191896967 2022 11.300032056140836 2023 5.205155362015489