Year annual % growth 1977 2.556205728364816 1978 19.722222222222328 1979 33.128488116887155 1980 20.461610927932043 1981 8.242746539454245 1982 -0.14449822989668348 1983 -2.3514941031763215 1984 19.339063426200354 1985 3.396249844778282 1986 -4.3835945475289435 1987 2.499528983231798 1988 -10.5048710250598 1989 21.449354739328456 1990 2.748104512528627 1991 0.523953256566287 1992 34.65410539445145 1993 1.1652936258513336 1994 17.350104351121317 1995 1.2581089311699714 1996 -7.842612140583199 1997 10.78752661043876 1998 9.2731431031158 1999 7.369514835857856 2000 6.762367912593078 2001 8.422093099544554 2002 19.333973215971056 2003 2.830335972392106 2004 16.92080521430033 2005 7.7758084139968275 2006 11.247574360745489 2007 9.167560602230182 2008 14.799309734251835 2009 1.9851937392968608 2010 2.0036927679243774 2011 3.8923409054393687 2012 2.3771386207375826 2013 1.9727006865541767 2014 1.5915750660378478 2015 1.4132082176903822 2016 1.3497462702373895 2017 1.2620154327989184 2018 1.7237426690546158 2019 2.2791706989672633 2020 -1.001934864602191 2021 2.3205839603566147 2022 3.332406681812799 2023 3.5169638596592705