Year annual % growth 1966 15.453664806517182 1967 14.600554184542204 1968 13.794948446274688 1969 24.58346539288938 1970 5.3324885319037065 1971 -1.1325732236491035 1972 29.417861996244824 1973 -17.87625971187532 1974 -14.63058104146478 1975 -1.1528040688894379 1976 21.054687294114416 1977 -0.5216676144412418 1978 20.652620455865417 1979 4.87736404739627 1980 10.409185813711602 1981 22.908882916879804 1982 -9.69963403503688 1983 -0.17887132560097996 1984 0.4214808035902138 1985 6.396543277203222 1986 8.861645049873104 1987 4.217140576226711 1988 9.299513232125278 1989 2.0473339929719003 1990 -5.006555481607975 1991 3.4851305651922644 1992 2.4495873665675134 1993 2.2714668117110364 1994 -57.12151032981291 1995 37.124240591564416 1996 3.146895594186688 1997 24.484908802681986 1998 6.56761447319893 1999 -0.020288194454593622 2000 11.476139697524118 2001 6.763392342307895 2002 11.594700553049051 2003 6.946371841192018 2004 10.2258111844274 2005 11.893286959407831 2006 13.29441190692846 2007 12.225775220225273 2008 13.813545987133608 2009 6.241182301561409 2010 9.190652786563518 2011 8.013333314927323 2012 11.561041839112974 2013 5.252972150208862 2014 6.981345926115125 2015 10.420712215562446 2016 7.15422739190619 2017 5.583284512280542 2018 9.69180957665452 2019 8.284850160205437 2020 -5.541354065654829 2021 11.877192082565543 2022 12.160000968869241 2023 11.185566980491956