Year % of GDP per capita 1997 38.25692 1998 31.30347 1999 32.02581 2001 24.60233 2002 24.50902 2003 21.97225 2004 17.71677 2005 18.35466 2007 19.98312 2008 21.50515 2009 25.63828 2010 23.18904 2011 24.17478 2012 20.40295 2013 27.77545 2014 31.87478 2015 33.95498 2016 36.92339