Year annual % 1991 11.99358111515916 1992 13.171745343996676 1993 16.375907863770166 1994 20.784364435650843 1995 45.74334276276528 1996 36.77008789747319 1997 13.290492691958093 1998 -8.342951750043085 1999 33.46090536099044 2000 23.346051923834082 2001 2.748200453706488 2002 8.71188048361509 2003 10.892342838930233 2004 14.113319988449845 2005 18.533353551815708 2006 13.588647275420968 2007 10.888282434850154 2008 20.37774623576496 2009 -8.705270020296638 2010 23.616292018244934 2011 18.11366666967156 2012 5.893158922512924 2013 9.208957049150769 2014 7.163324220027945 2015 46.47625122557781 2016 0.1344108442609837 2017 18.5535661652076 2018 14.853664766183059