Year annual % growth 1961 -9.728799602744488 1962 31.902714150363607 1963 15.07592596671823 1964 0.18849571729420234 1965 8.592096511446854 1966 13.3699118723776 1967 30.081506537518578 1968 -0.11748483879608784 1969 1.0978241977757506 1970 5.2937751300493545 1971 -18.784530180553844 1972 -2.0408163890497093 1973 26.851851475422748 1974 33.57664238975073 1975 -21.72131190277085 1976 7.155323012315677 1977 34.690553593628465 1978 10.456920164215205 1979 6.452972701351484 1980 -11.700927541213488 1981 -19.67344344920147 1982 -34.061188456199474 1983 7.237890684508457 1984 27.54794115170158 1985 5.801928872198744 1986 -14.34052213964003 1987 31.115412245801707 1988 24.425747396532557 1989 -5.197061478995238 1990 6.018759765796915 1991 10.410435043531379 1992 12.944815079993518 1993 29.536871475255055 1994 8.97188548377379 1995 5.05887560838238 1996 -7.273212644670224 1997 7.473307770650919 1998 2.6265396921337754 1999 9.364069838800447 2000 6.579843948072252 2001 -3.9011229400612564 2002 -4.564079216936037 2003 4.866916029706729 2004 21.933887487421245 2005 -1.1517220717996253 2006 7.216441787255221 2007 24.659583660015684 2008 8.903607009076893 2009 -44.24215875585135 2010 12.007877483292063 2011 24.124731466890623 2012 -2.703538242053966 2013 -11.443319911866283 2014 9.377573347763672 2015 22.428006775832856 2016 -5.181827366127706 2017 12.557906830226443 2018 7.865515368025953 2019 -12.239061671302593 2020 -16.491273072717505 2021 30.328959185320343 2022 11.519394399392809 2023 -14.840784979573115