Year annual % growth 1966 20.46630174515404 1967 12.848097472508854 1968 8.128762145776307 1969 8.06671320967665 1970 2.9854763845125376 1971 -42.23961441333627 1972 8.597483124034838 1973 11.307683428124292 1974 11.04292627697474 1975 -24.00089010733126 1976 52.75032519518251 1977 -0.48465275408304365 1978 -9.269223637702964 1979 10.078080348669232 1980 7.361815869179438 1981 9.890033708096396 1982 7.700013830954305 1983 -6.406683872608127 1984 14.980152274096994 1985 18.79392554541272 1986 -8.250573693879687 1987 -4.565759625072772 1988 18.974718112042083 1989 1.997642072918154 1990 -3.81994928078376 1991 7.244394289584861 1992 5.2331791669915475 1993 -23.042800070879537 1994 6.724444573230599 1995 10.004638586659226 1996 27.90795245672524 1997 8.058426481001419 1998 4.387293329491499 1999 1.6908209248216934 2000 -2.3277889729926216 2001 0.4194226480584575 2002 4.534021540172091 2003 5.490515578406104 2004 -1.544935885690606 2005 -4.19928164124957 2006 4.519753011999001 2007 6.632274025772972 2008 3.654713207182496 2009 6.875639390676724 2010 3.079478340487668 2011 6.221558053100338 2012 2.697579776871109 2013 4.097270479798951 2014 4.794770337844696 2015 5.227047547270189 2016 3.6043445740876763 2017 2.90159269183836 2018 4.6488484889407005 2019 5.597844980220117 2020 -6.185108591389707 2021 11.977155708188377 2022 4.703023167951258 2023 4.261708630839294