Year annual % growth 1961 11.793253089787669 1962 -7.562349316549344 1963 2.556930223868875 1964 10.624555890506372 1965 -2.1110746732014434 1966 36.1557755829987 1967 -9.175120358671435 1968 9.062347993106528 1969 14.065761107014296 1970 0.9996731763927613 1971 8.468368300234317 1972 3.1668539930212773 1973 -5.3574634441822155 1974 3.4110593906934668 1975 -38.45937457129583 1976 4.187458703442459 1977 35.516496520946475 1978 17.43394341091313 1979 22.79488214600312 1980 18.886474838195298 1981 15.823207571511404 1982 -35.08380615168349 1983 -18.376505199054137 1984 12.891469294759261 1985 -9.7805736779858 1986 7.913842353096399 1987 18.609788132404034 1988 12.793285029142723 1989 25.038421937540463 1990 5.808787230541341 1991 6.952423271584635 1992 21.807849246131752 1993 14.181385853300625 1994 10.119034409924964 1995 24.981040359180653 1996 11.832953393280704 1997 13.107847802569637 1998 6.87669997216382 1999 -9.893566877756157 2000 10.569389156986645 2001 4.99711731564301 2002 1.8377933843422198 2003 7.872954905883063 2004 19.5061130578775 2005 18.37021360335811 2006 12.536264103615366 2007 13.754135005481189 2008 10.8579371832692 2009 -17.700940069367505 2010 25.242683731806665 2011 15.838952477556248 2012 3.8156711095639366 2013 1.8580787264558865 2014 -6.581306901900618 2015 -0.8541752508295275 2016 1.1694329344803975 2017 4.454601413373467 2018 8.604211158430601 2019 -1.7347805852655114 2020 -12.325633236780973 2021 31.890191360198912 2022 1.5271086806375394 2023 -12.011773870041438