Year annual % growth 1967 6.72950520154005 1968 3.5916355195576557 1969 5.714271248920923 1970 2.4811253788071355 1971 0.8387942960239627 1972 0.051002614100227106 1973 7.566799951330864 1974 -2.2673573850401993 1975 3.142289940325412 1976 7.626161289530131 1977 1.9838285862040692 1978 1.7290506515932123 1979 1.031870630709136 1980 -2.2375019533481435 1981 -1.2560483083341438 1982 1.408171171838731 1983 1.9125972212019207 1984 3.517198708867724 1985 4.489150524440191 1986 7.129692370739775 1987 -1.9036232623861622 1988 -1.8327030078175284 1989 0.31812500678366007 1990 0.8008731804946905 1991 1.6225894619817751 1992 2.565403552986197 1993 -0.8607841133211593 1994 6.658214024101255 1995 1.6788244413707503 1996 2.4550115860097605 1997 2.9456864480117844 1998 2.3523956477522034 1999 -0.11972279483813963 2000 0.38664480747299024 2001 0.2284513490665887 2002 1.4459313287498219 2003 1.3342501180972306 2004 4.6472243307377425 2005 3.698267769471215 2006 2.9477633395983815 2007 1.7690422731172077 2008 0.4903918111267984 2009 -3.43211477058243 2010 0.7836076884304362 2011 0.27576679608722543 2012 0.5124218815015809 2013 0.2794040752181104 2014 0.9114009844867894 2015 2.2805494242863062 2016 2.4225166077910956 2017 2.28819307686436 2018 3.489926833173598 2019 1.581780542211547 2020 -1.3748352978637115 2021 5.472057015565326 2022 -1.4298375383698527 2023 1.0432636745537565