Year annual % growth 1966 -7.1556249616765655 1967 21.631451696460573 1968 4.242008480441115 1969 15.182586221448943 1970 16.83798846181115 1971 17.295771800917038 1972 11.782150341158854 1973 16.94269445120797 1974 8.25658912672867 1975 2.2043216701999313 1976 2.1696766415434894 1977 0.6358073632930541 1978 3.795455113315967 1979 8.528566655540004 1980 -1.3805537135926471 1981 3.3291593833394018 1982 0.3184021817662881 1983 3.17158767270827 1984 5.724871423322298 1985 -0.32025344930131894 1986 2.636415297942179 1987 -3.059373146709163 1988 4.8468144443436785 1989 -4.852952671467165 1990 7.232074279118052 1991 -3.723154840545618 1992 5.476748998336163 1993 1.9336415000960443 1994 3.5136875206042077 1995 5.029147195743079 1996 3.817055881381947 1997 -1.583250257099806 1998 4.388758186715975 1999 7.6912189297071905 2000 0.02638116742201646 2001 1.9646594175349463 2002 3.2005717165377803 2003 2.424658137676275 2004 3.523367680234756 2005 4.000234865568302 2006 1.5190832202479214 2007 1.2543480777270162 2008 8.622039163287383 2009 -0.8178908512847443 2010 2.900662134110732 2011 -8.738813454105653 2012 3.0371575916580866 2013 4.519810938481797 2014 20.1087136003907 2015 3.017917055403359 2016 0.07840818571698094 2017 3.6266444117787984 2018 1.730333826752556 2019 0.04274491644493139 2020 -16.93468316683125 2021 -3.076388053524653 2022 21.1378543368602 2023 6.907497702122825