Year annual % growth 1961 25.14284980877389 1962 0.9132413623693196 1963 -17.194567500134752 1964 -10.928959375434388 1965 -2.453990466347264 1966 41.935483853503825 1967 -30.143540684065485 1968 3.5958904166354415 1969 9.586776881283626 1970 11.312217180113478 1971 14.363143644985783 1972 19.549763024606165 1973 15.26263627998135 1974 180.99742045074373 1975 23.684210522647575 1976 43.07228232128321 1977 -21.89150385617961 1978 -61.965906578172344 1979 23.5157159541795 1980 2.6165379739194066 1981 46.17653254280191 1982 -6.787721570128227 1983 -4.57637600642866 1984 5.2171095242079275 1985 9.608869681256337 1986 -16.366956970855668 1987 -53.09927733737073 1988 94.66332247264603 1989 -35.363385500255646 1990 0 1991 18.248220894290938 1992 -12.590106395015141 1993 1.5651496155127802 1994 -0.12528460562154464 1995 4.8071337477649365 1996 16.907192395694537 1997 29.499840372028785 1998 14.2968504229124 1999 -38.76075926997075 2000 -8.270341807879191 2001 10.730220163381702 2002 22.872614606888803 2003 -17.37305402674349 2004 0.6845727482135402 2005 3.294389213429554 2006 8.345962447138163 2007 12.113589934785864 2008 7.195349462440291 2009 -8.416906522877795 2010 29.342878371410507 2011 16.505901853636786 2012 21.87868183569526 2013 1.9465519425877318 2014 13.487766824721064 2015 -13.676922419350149 2016 -0.789533876753282 2017 -11.565733839668297 2018 81.78414960401591 2019 21.515265625485995 2020 -16.668641532743152 2021 9.18108232251798 2022 8.280464029267847 2023 -0.46755337003105524