Year annual % growth 1961 -8.639718804920918 1962 35.16466605109264 1963 24.997153592166683 1964 -24.857676367445464 1965 13.461421904357834 1966 49.52991452991452 1967 30.155044298370967 1968 42.263881645760705 1969 26.08477552044144 1970 9.138345243378069 1971 20.13936598292277 1972 0.17038757337752486 1973 33.99275336991602 1974 19.612207634118775 1975 4.189988805373417 1976 24.508476941324204 1977 22.074101469253264 1978 30.471744449187753 1979 13.577193439208529 1980 -3.335863083714088 1981 4.672558771502537 1982 1.5136068479688447 1983 6.884290716295567 1984 4.3201620730908985 1985 -2.0418209505056524 1986 33.20208741751111 1987 18.09364493033013 1988 13.222983824962029 1989 15.817542249514375 1990 13.434422126023676 1991 19.98406948066507 1992 4.816966485408372 1993 6.74364467013649 1994 23.93607763508345 1995 22.030321986702916 1996 14.135969549218942 1997 2.36240320242311 1998 -24.218779148871604 1999 24.635467268860126 2000 22.092734793113024 2001 -3.4621787546337544 2002 14.891183013271103 2003 10.47927132648887 2004 12.084199245683692 2005 7.752680137161221 2006 12.471895668325601 2007 11.383142942152816 2008 3.2630487512030015 2009 -6.907621961112326 2010 17.509762757666493 2011 14.512028195734587 2012 2.56759092816678 2013 1.639916118849996 2014 1.2631779469967768 2015 2.1126543365023593 2016 5.174639537080239 2017 8.85698210884091 2018 1.7128822316398526 2019 -1.9093601680955743 2020 -3.1282650769126548 2021 10.095078700407626 2022 3.5396080866895545 2023 3.0880631545971085