Year annual % growth 1966 1.6306974015129327 1967 3.5567075611303522 1968 0.6849240044416689 1969 3.5658060916195353 1970 2.291860226574755 1971 4.885898243015973 1972 2.32673236652667 1973 3.421218953148994 1974 3.6264046722570953 1975 2.8589718553186003 1976 1.9887907118244499 1977 6.102537918185689 1978 2.478402736827931 1979 1.9464212921100454 1980 2.901960787702464 1981 5.79122328134325 1982 0.33131983631162143 1983 -0.10201073818964801 1984 2.3623878964789355 1985 3.984471221984748 1986 -1.9851626431876639 1987 5.75589166925252 1988 1.7234194042649023 1989 0.19505629356591214 1990 2.05428336852475 1991 2.544193067673149 1992 1.9394886454866054 1993 2.118124144023909 1994 4.103110014022107 1995 3.829479494132997 1996 2.4452526053395047 1997 1.0287787970388678 1998 3.0765037793311336 1999 3.3050412926540815 2000 1.7937788329393811 2001 3.3253374253904724 2002 2.95725519097887 2003 5.8261814946032615 2004 2.1375011177212144 2005 3.685946727626856 2006 4.191967918515374 2007 4.287913077301823 2008 2.448665639728034 2009 -5.28065040292752 2010 8.074449735181744 2011 3.194934186201465 2012 -1.4725568359720569 2013 6.505925917403047 2014 2.5380990877161196 2015 3.28114902518395 2016 -0.9476220786363854 2017 7.142465993180295 2018 0.4417940531802742 2019 3.0044756548533513 2020 0.6975924893914964 2021 1.9600642063993803 2022 -0.41213898430989104 2023 3.9120366772608293