Year annual % growth 1971 4.488718866277466 1972 5.161152357392723 1973 5.084208160287986 1974 1.4045670849163798 1975 1.689161936881817 1976 3.9526183921999802 1977 2.6222068828068785 1978 3.1686615018671205 1979 3.685524592906546 1980 1.7421299921700069 1981 0.4666183716061738 1982 0.8309369301071143 1983 1.3953209793896377 1984 1.5689639090731902 1985 2.547452904559492 1986 4.080885488723851 1987 3.7745782954271334 1988 3.909694574463245 1989 3.2613563559794585 1990 2.893405072773845 1991 1.2039970039265455 1992 1.6963335483531239 1993 0.11092839307065105 1994 1.5154681343966843 1995 1.8570433993243824 1996 2.6644577957384 1997 2.8530610250731456 1998 3.0467557965411913 1999 3.0423891995188512 2000 3.4176365870600307 2001 2.1735424854491896 2002 1.7646631605286132 2003 2.2404925994570704 2004 2.9907990271293556 2005 2.9833204115306273 2006 2.7027257320854687 2007 3.302130306990108 2008 1.1553066078392646 2009 -1.7514804170280485 2010 1.9276570436799858 2011 1.3614674490125935 2012 0.655998665606532 2013 0.9835042504006992 2014 1.4601632433403466 2015 1.421969885403314 2016 2.1928885673384286 2017 2.4546423298337032 2018 2.0526992772599897 2019 1.732247665865458 2020 -7.231585303467639 2021 6.016004948753178 2022 4.5068851905362095 2023 1.694593563411729