Year % of GDP 2000 4.23492479 2001 4.0346489 2002 4.72302485 2003 4.18767118 2004 4.30805206 2005 4.43451166 2006 4.15431976 2007 4.1536026 2008 3.6575706 2009 5.48676443 2010 5.08042908 2011 4.72197914 2012 4.63289499 2013 4.80276918 2014 4.87136698 2015 5.65026045 2016 6.50998688 2017 6.57946634 2018 6.5323596 2019 6.83128405 2020 7.53854179 2021 7.0194726