Year % 1978 -0.4512626237055077 1979 -11.203225510427105 1980 -3.766860946866174 1981 19.229244786687193 1982 5.988319670001736 1983 5.234921700673078 1984 -4.450063397403898 1985 6.59678082210115 1986 16.980337546551844 1987 15.963391073059057 1988 8.22173811135184 1989 -2.402625004585073 1990 5.997142468084525 1991 8.348477598423479 1992 7.833429516725322 1993 5.591120352654149 1994 7.090833433619798 1995 -0.7272684646984516 1998 3.5436736583210364 1999 0.2450482181927009 2000 -16.679197535685603 2001 2.732903687624831 2002 18.25203630620585 2003 5.614402301612368 2004 4.514521186944193 2005 -0.3337126999637456 2006 13.833187312008556 2007 7.915110852224476 2008 -6.194832539572425 2009 3.2745575017027355 2010 3.554153981957397 2011 4.492486952850089 2012 0.022685618941866888 2013 6.6643715965697 2014 9.840570484513416 2015 -4.93706084453044 2016 13.137307707725492 2017 3.0035967799596883 2018 18.15767575698983 2019 13.565902394646418 2020 5.877798673697664 2021 4.000870676694638 2022 -5.543080237956686 2023 -0.13111572391991422