Year % of GDP per capita 1998 20.19353 1999 17.65592 2000 17.33307 2001 16.08829 2002 13.06567 2003 10.37139 2004 10.90728 2005 11.70836 2006 13.07729 2007 14.23457 2008 14.98778 2009 17.68235 2010 16.12808 2011 15.94486 2012 16.31633 2013 16.77133 2014 16.26738 2015 17.24864 2016 16.08373 2017 16.91251