Year annual % 1961 14.987080103359174 1962 20.89887640449438 1963 11.593866171003718 1964 11.734332708723715 1965 19.83192337793016 1966 18.216734827162608 1967 23.826686309586446 1968 15.611124094414583 1969 9.194736938824265 1970 8.762969009012041 1971 4.556110015086457 1972 8.46060498431303 1973 20.359808429641557 1974 25.002692423237598 1975 32.470718402401474 1976 32.63959964263587 1977 22.304976618872132 1978 28.19978815079275 1979 26.27084749500878 1980 27.773403894783495 1981 20.748644226178577 1982 18.861208761778276 1983 14.999111515470293 1984 8.916745111443088 1985 6.636340524442508 1986 10.623696198220443 1987 15.65636497282985 1988 15.54602782037668 1989 16.54727484261878 1990 8.269464913705821 1991 15.803698427161434 1992 3.3415349505661234 1993 4.506643254707322 1994 3.33309687068679 1995 5.7283961409090045 1996 -0.9098286675158513 1997 7.6418712989466115 1998 6.315016402068037 1999 15.500800986259785 2000 7.623095433631569 2001 8.102770808613762 2002 8.590775448162812 2003 16.61472133480703 2004 10.461572851305977 2005 21.414347800109116 2006 12.835940701730609 2007 12.425078129373562 2008 21.09420907368073 2009 24.28963352831015 2010 9.223377478322927 2011 2.6978001189961307 2012 -2.0420801636346173 2013 14.15544183313568 2014 -4.161424949265544 2015 7.540073646195769 2016 4.343405255618126 2017 -0.0445764347295129 2018 0.15645137857731414 2019 5.130433342045157 2020 5.735275825534634 2021 7.035692922319482 2022 5.378428891234623 2023 2.0864885057388864