Year % of GDP 1998 2.74788999557495 1999 1.92193996906281 2000 2.11366009712219 2001 2.36509990692139 2002 2.15949010848999 2003 2.28315997123718 2004 2.56690001487732 2005 2.6566801071167 2006 2.56340003013611 2007 2.36331009864807 2008 2.77728009223938 2009 3.08927011489868 2010 3.67997002601624 2011 4.40000009536743 2012 3.56202006340027 2013 3.3275101184845 2014 3.161789894104 2015 3.17298007011414 2016 2.89910006523132 2017 3.53558993339539 2018 2.93161988258362 2019 3.00300002098083 2020 2.93899989128113 2021 3.19300007820129 2022 3.21099996566772