Year % of GDP 2000 3.1973834 2001 3.18946862 2002 2.49063969 2003 5.05360985 2004 4.63368416 2005 4.46591949 2006 4.25775146 2007 3.90997243 2008 3.69581532 2009 3.5801971 2010 3.29653287 2011 3.32077932 2012 3.35984254 2013 3.4206934 2014 3.34840417 2015 3.58194995 2016 3.64773679 2017 3.74762511 2018 3.09069347 2019 2.98547053 2020 3.38063431 2021 4.07625723