Year % 1979 -15.22853432886627 1980 -19.535951866636005 1981 0.3375109036873897 1982 16.262288860802563 1983 26.26921859535744 1984 10.552299199623437 1985 16.777488851426096 1986 40.458076323216005 1987 1.636297110106956 1988 4.600458012332939 1989 8.250786719788948 1990 -0.18481634853026832 1991 15.140430694150075 1992 8.36965850759998 1993 13.015497864313884 1994 7.145283267980003 1995 2.252305677156322 2004 -6.119690215429467 2005 -18.301316872246396 2006 -1.0904355305694207 2007 -3.1914316580933253 2008 -13.06383636284013 2009 41.25294813787953 2010 0.2730603074175771 2011 -10.80839955206301 2012 -0.8923709416403541 2013 4.312090758282691 2014 6.543701477426499 2015 39.4893730514304 2016 14.301155709688837 2017 -2.867711715385011 2018 -6.612818866819103 2019 9.937804817980943 2020 22.59952356173004 2021 -15.200091896176177 2022 -16.935513738919294