Year % of GDP 2000 6.12679291 2001 6.01767921 2002 5.90386152 2003 5.47972536 2004 5.47516584 2005 5.00639105 2006 4.76326609 2007 4.55249786 2008 4.56869602 2009 4.46966648 2010 4.41577387 2011 4.39700699 2012 4.4273715 2013 3.71773791 2014 3.7310183 2015 3.2198832 2016 3.32101274 2017 3.24693036 2018 3.0916779 2019 3.21496511 2020 3.62587261 2021 3.13269377