Year % of GDP 2001 13.222436656838951 2002 13.048588693496603 2003 16.561887833955232 2004 19.510137953239123 2005 20.632658111538934 2006 39.42666185853644 2007 60.50531055983906 2008 41.19526667928797 2009 32.17999157752912 2010 29.075585557902908 2011 24.0391660876668 2012 17.723876459689137 2013 15.257039046414892 2014 13.95989272062791 2015 16.061355883773118 2016 14.99697923565255 2017 16.707245824341687 2018 15.238567357943104 2019 14.938140821722522 2020 35.542271258585814 2021 22.99333189183647 2022 24.69168802914802