Year % of GDP 2002 9.44339085 2003 8.94125843 2004 9.80847359 2005 9.94828892 2006 10.62276554 2007 9.90467453 2008 10.25649548 2009 9.81848717 2010 8.56967163 2011 8.56190777 2012 7.89716864 2013 8.80596447 2014 9.52887821 2015 10.10534763 2016 11.81859016 2017 12.62081718 2018 14.20841885 2019 14.83131981 2020 15.53361416 2021 21.82794952