Year % of GDP per capita 1999 16.87322 2000 16.24497 2004 12.42717 2005 13.71514 2006 14.12419 2008 15.48145 2009 16.09631 2010 18.24662 2012 15.03615 2013 16.10865 2014 16.34612 2015 15.10773 2016 16.23127 2017 16.55987