Year annual % growth 1966 -9.443052120366175 1967 9.090936630282613 1968 -9.313778571123848 1969 -4.594610042599911 1970 19.830060448307066 1971 26.241167678535305 1972 27.15352706400816 1973 17.673040410238386 1974 58.07259937418604 1975 36.02344171691675 1976 17.40065751722051 1977 0.15247710396899095 1978 12.210722419904997 1979 -5.020359154347304 1980 -12.828562978371522 1981 21.271703587833457 1982 11.27028657884459 1983 -2.6718499778851594 1984 -8.48515741606063 1985 8.126531127315758 1986 20.05045096804477 1987 26.13445306541584 1988 31.52897461150073 1989 11.738635905404891 1990 3.2638240134998995 1991 8.307729177212735 1992 3.0803487118358674 1993 -8.572004919260365 1994 3.430600784487183 1995 17.38353807636372 1996 20.669783618824084 1997 19.482351988686304 1998 4.644354761692696 1999 1.0918125988517886 2000 -1.0764564140735615 2001 1.0701542498354968 2002 1.3547229092170028 2003 -9.952042785193527 2004 -0.1886911059625902 2005 1.844592216722333 2006 20.009479967944714 2007 25.696425347302338 2008 -2.5655252467609984 2009 5.009704576882285 2010 3.909227241809205 2011 11.35095183861543 2012 3.7060451257966207 2013 6.533785232613326 2014 8.335691882539464 2015 -15.521624061396338 2016 4.956431445765915 2017 -2.161124971910226 2018 -1.1647177992967386 2019 4.520870947890572 2020 -14.90419310604021 2021 8.074373700343003 2022 8.201496025804161 2023 1.886829718466572