Year annual % growth 1966 4.784888522805076 1967 -23.580172926338363 1968 -42.25135646049698 1969 -4.159553632904874 1970 20.026412451357274 1971 2.8265095394512514 1972 33.26151697299687 1973 -0.5076956377834847 1974 17.49626510472355 1975 25.180650512828322 1976 -9.354449782467839 1977 23.751874201765546 1978 46.91521907489505 1979 -6.222569850797726 1980 -12.395026619708943 1981 14.062445839375144 1982 8.025074852369855 1983 11.567498074857284 1984 0.8354639148290062 1985 9.255386372269484 1986 7.154570990417298 1987 -7.7298249424588334 1988 -2.7259565374526744 1989 -10.008841887271274 1990 -8.264691869100389 1991 -2.254064501047111 1992 -11.043908398899134 1993 -21.775960422627705 1994 2.2255190244432583 1995 5.776015801747008 1996 5.215520964686121 1997 6.117227170030205 1998 4.1932511643564965 1999 3.752006404677516 2000 5.291322517538035 2001 6.331290262866318 2002 2.2064062346975675 2003 8.692136299194985 2004 9.591774926804916 2005 7.015890480819721 2006 3.462711602795082 2007 7.631171000858174 2008 6.600702227820747 2009 4.845344972258232 2010 4.675114482847505 2011 6.327615149389771 2012 3.0555823763902765 2013 5.338699778325221 2014 6.2963929650856585 2015 3.229784255691584 2016 4.428686025570542 2017 4.758910900145423 2018 5.094494314335307 2019 3.1473848624612515 2020 -0.516478499519593 2021 3.0189047329326684 2022 4.292635286530327 2023 4.500617869169602