Year annual % 1971 -6.1941041611542005 1972 3.613007357226209 1973 20.589514994338785 1974 1.2313904112180012 1975 -0.8302383421720805 1976 0.8166781876160343 1977 -4.8076390670477025 1978 4.650019603265605 1979 -0.5310636825724231 1980 24.6399843420227 1981 25.903945752731047 1982 -0.39285684480528005 1983 0.46931822622715913 1984 15.587572631297377 1985 -2.245280713974097 1986 28.734776560528104 1987 44.75411720966875 1988 33.321971775870935 1989 39.35750684048048 1990 42.239046708522665 1991 25.3451930554061 1992 39.55872012568241 1993 75.38763158121029 1994 74.18961538332442 1995 50.063918613083274 1996 99.23595815413623 1997 39.11397627952806 1998 16.000023637578238 1999 7.904796029461195 2000 9.976015105933229 2001 7.184471095735816 2002 11.51481225978084 2003 13.839797782270537 2004 14.839341732124822 2005 19.092574140870667 2006 13.32499891714616 2007 9.602581899708952 2008 28.828286449499643 2009 13.953332831159088 2010 6.965346502901241 2011 11.680685162704506 2012 6.467784860267045 2013 7.20253361267136 2014 4.622698603894108 2015 4.503709563735626 2016 7.053474685135043 2017 4.080784811961834 2018 8.919649686138428 2019 11.264360343313243 2020 9.268282147724065 2021 5.1643349248259796 2022 16.30361655393699 2023 8.65656256373866