Year % 1985 -1.2114332672531534 1986 4.0379119196106 1987 5.416926307071301 1988 -0.4144470877163428 1989 19.562129163158783 1990 21.554699194427254 1991 5.918426109328431 1992 9.259425198535661 1993 10.860313997277196 1994 5.1332017037765025 1995 5.801214299606364 1996 12.767207062103902 1997 11.941948680895205 1998 19.240628327416168 1999 10.211969772658605 2000 9.834873250769624 2001 7.301564239996977 2002 4.274612251616837 2003 1.8010282127806883 2004 -1.7731953323052247 2005 -0.4130274871141314 2006 -3.8722010411320174 2007 3.409024449381207 2008 12.910470194421992 2009 3.5459721173414582 2010 -3.7687958069470398 2011 5.587457771597545 2012 9.22337834379692 2013 6.846326433625242 2014 2.1210253075597976 2015 0.5341005045329292 2016 0.982913241202724 2017 -0.2626553008842001 2018 2.547312161376378