Year % of GDP per capita 1998 20.10304 2006 20.29257 2007 21.09132 2008 21.07791 2009 23.85787 2010 23.88146 2011 22.84118 2012 23.04534 2013 23.18698 2014 23.19245 2015 23.00137 2016 22.95939