Year annual % 1987 -2.98171968973305 1988 3.75217406793153 1989 -5.95631004448833 1990 8.36590820792776 1991 -0.31404289277333 1992 9.21954523785735 1993 -5.11260489837632 1994 -5.12580508681208 1995 3.95130898363622 1996 9.32321863451226 1997 -1.45089872612094 1998 -1.71613177780038 1999 -1.88550292141593 2000 -1.03092618503963 2001 21.209244876138 2002 5.62919353968647 2003 4.17208498018383 2004 1.49220204435758 2005 9.14077313078469 2006 -7.93972254103204 2007 16.500834950265 2008 -9.58786287826871 2009 8.74952275161792 2010 0.210641515742708 2011 -1.82504707340057 2012 0.319687174260054 2013 9.87299266852968 2014 0.169342584178153 2015 -0.44168859089821 2016 -1.69974769789899 2017 0.766246053931539