Year % of GDP per capita 1998 15.11422 1999 16.60092 2000 15.74535 2001 16.89971 2002 15.21159 2003 12.85688 2004 12.94152 2005 16.11186 2006 16.7607 2007 17.83472 2008 19.1992 2009 22.23454 2010 19.26875 2011 20.64525 2012 20.75691 2013 21.62494 2014 21.31954 2015 22.87436 2016 21.59171 2017 20.6226