Year % of GDP 2000 3.2540555 2001 3.50531387 2002 3.76324773 2003 3.60058308 2004 3.4343946 2005 2.86616707 2006 2.79110265 2007 3.12948751 2008 3.66806316 2009 3.41018438 2010 3.60705996 2011 3.60456705 2012 4.09601831 2013 4.15482092 2014 3.99039125 2015 4.13518047 2016 3.83726597 2017 5.01613283 2018 4.14253378 2019 4.37294102 2020 4.48994827 2021 4.82379913