Year % of GDP 2000 9.668906955486635 2001 10.956364864715274 2002 12.116372065197881 2003 14.988622460329228 2004 17.179163450354988 2005 17.000660306948056 2006 17.512381573405573 2007 19.42460696680458 2008 20.155647539043805 2009 15.636676087939083 2010 14.442091437614557 2011 14.35028685313537 2012 17.07700370380198 2013 14.464260350661926 2014 13.626712920183481 2015 14.316428355703717 2016 13.98286521602585 2017 14.92495465569839 2018 16.112990824123376 2019 17.554025609296957 2020 16.112556673891028 2021 15.827964095464731 2022 16.99114261984833 2023 15.728943087178548