Year annual % growth 1971 4.400752189643043 1972 5.970909241551141 1973 5.518526553312213 1974 0.6222375037107355 1975 2.388560162907254 1976 4.4541378310103 1977 3.508213550348472 1978 3.915175866323864 1979 3.4283927954280387 1980 0.8599688431576453 1981 1.259737916404461 1982 1.6379988070785743 1983 3.4757551520259398 1984 3.39387562562419 1985 3.854016917308911 1986 4.132418604937115 1987 3.7488892596807517 1988 4.291896790647627 1989 3.501369757697219 1990 2.74089707099003 1991 1.0408473579368973 1992 2.667548594807286 1993 1.7663364376757613 1994 2.984468233256848 1995 2.5836858137258787 1996 2.928818463833835 1997 2.9280676758365303 1998 3.262484913961572 1999 4.206101912181651 2000 4.005035970229457 2001 2.399227759884994 2002 2.1193128198889895 2003 2.270817647252315 2004 2.859308171331037 2005 2.9302220988521697 2006 2.4627990052026973 2007 2.4526001985829993 2008 0.33356163781502346 2009 -1.1640546961125438 2010 1.9472266777161025 2011 1.1741148881510668 2012 0.9958719034540309 2013 1.3919115233063337 2014 1.857905026489533 2015 2.485921564306537 2016 2.149592281606033 2017 2.301939850390042 2018 2.1877503912299545 2019 1.518694874797788 2020 -4.9859119227268 2021 6.109859427190159 2022 3.077626544344753