Year % of GDP per capita 1999 16.81586 2000 16.3202 2001 16.73011 2002 17.20851 2003 17.70462 2004 17.78093 2005 17.21847 2006 17.3281 2007 16.79146 2008 17.70355 2009 19.51865 2010 20.12141 2011 20.22268 2012 20.60201 2013 20.71923 2014 21.13702 2015 21.99535 2016 21.50883