Year annual % growth 1962 16.918844362284943 1963 -4.470590137007719 1964 0.24631265561561122 1965 6.756754226430701 1966 0.26509744239795907 1967 23.524003991550146 1968 4.029100397873492 1969 -1.1488479689619453 1970 8.482892961874171 1971 1.7226764698479542 1972 41.369997114599585 1973 -6.7970348783046575 1974 65.86685179226265 1975 10.519520237934415 1976 52.69473547191879 1977 -12.716888885335948 1978 -20.544419021462318 1979 -6.473390495348582 1980 1.2719479389669601 1981 23.49470901151247 1982 19.075542283259466 1983 -2.6902149128044215 1984 -5.582284460836817 1985 0.9958742396473497 1986 13.466798746263308 1987 -11.863571633073207 1988 -9.031812898305304 1989 -7.312553213148433 1990 4.808840883903613 1991 -15.238524721963117 1992 -15.238524179962681 1993 -4.8287004646490175 1994 -4.828699802354549 1995 17.36663708788322 1996 1.5790871646362348 1997 -6.147612074871304 1998 6.3252039560530875 1999 5.838659103026387 2000 23.298778611798696 2001 9.636801635842247 2002 -5.413198544651493 2003 25.940244690752394 2004 50.394441103581954 2005 26.39863266527236 2006 -19.2506213050669 2007 12.601582579244905 2008 11.980244423863368 2009 -6.172625746063062 2010 18.71551577823938 2011 14.197129752391064 2012 30.740783831002602 2013 -4.685314598723409 2014 -14.95529215617212 2015 -7.054761733138889 2016 -2.9264686099486283 2017 14.748628869324548 2018 37.167449066729176 2019 6.665762847316785 2020 0.38131547419159517 2021 -3.2802751582708964 2022 15.772924571104838 2023 -2.4945379451584415