Year annual % growth 1966 5.804622601186907 1967 2.86904581744858 1968 5.363447558454652 1969 6.809408828363502 1970 8.527554997587032 1971 9.261083046435246 1972 6.616302443685299 1973 7.355866020342788 1974 6.308531673749911 1975 2.7957493524906454 1976 5.222719920328018 1977 5.723238832655596 1978 7.963071707993109 1979 5.133274337506876 1980 5.001703911549356 1981 4.318074286140046 1982 2.9634683029370166 1983 0.9614544505542284 1984 1.5725005277089252 1985 1.9482409785132688 1986 3.7760552633046416 1987 5.020434736874009 1988 5.616581038916308 1989 2.606764821989998 1990 3.9725219643302836 1991 3.1939455647864463 1992 5.957113012261004 1993 6.385338164459029 1994 8.041253641817931 1995 7.208516501003643 1996 7.156512900440148 1997 5.144662461665675 1998 0.22839193354550957 1999 -3.828384206923033 2000 1.4315044330499092 2001 1.9619433449484802 2002 2.330368651648371 2003 3.488274779958715 2004 5.2941165486139425 2005 4.683748487876983 2006 6.312251390802203 2007 6.688097565825444 2008 3.2286923081701957 2009 1.5620486278286023 2010 4.921617369507956 2011 6.352895329858072 2012 4.333557255475682 2013 5.358069934341117 2014 5.469644487601272 2015 3.6011524420687095 2016 2.3764153487693562 2017 2.576482578728246 2018 3.663239615698771 2019 4.431348817941455 2020 -4.895890858462906 2021 11.708887934735941 2022 7.26905667905784 2023 1.5680397809059343