Year annual % growth 1971 4.425054605295742 1972 6.023649572590912 1973 5.514647936128171 1974 0.5909427415632109 1975 2.3315220909584866 1976 4.66538169064124 1977 3.3592315717400965 1978 3.9713574592218635 1979 3.4778905001785887 1980 0.8878959319100375 1981 1.2893522698681892 1982 1.5813720005258887 1983 3.470229682463028 1984 3.365766962660814 1985 3.861271556085427 1986 4.180528222256342 1987 3.814937269970514 1988 4.353161889566778 1989 3.570839627056216 1990 2.8050854144747888 1991 1.142414408452737 1992 2.815580348400175 1993 1.9497412092352988 1994 3.0986310105096493 1995 2.6575364699829294 1996 3.134432249380808 1997 3.0504150215446657 1998 3.256428227871112 1999 4.103439995892373 2000 4.0749969724634525 2001 2.489578756536062 2002 2.269734010702635 2003 2.360903849302076 2004 3.187703301087126 2005 3.141198086268872 2006 2.814931390923931 2007 2.9258792988315037 2008 0.7838916174403465 2009 -1.3978068739703673 2010 1.8593820600685973 2011 1.4093353574476453 2012 1.2048276862018525 2013 1.5040837093679613 2014 2.049320105218456 2015 2.180478681460258 2016 2.1098853004697844 2017 2.4795477443826144 2018 2.3281918596160978 2019 1.688982212769119 2020 -5.075073739729291 2021 6.350381625032725 2022 3.180901502465346