Year % of GDP 2000 1.80504513 2001 1.77201855 2002 1.93417108 2003 1.96152198 2004 1.99854314 2005 2.05873919 2006 2.10646582 2007 2.17268491 2008 2.11878848 2009 2.18321705 2010 2.28807664 2011 2.36418128 2012 2.3537879 2013 2.29574466 2014 2.27915168 2015 2.27217698 2016 2.38938212 2017 2.36720181 2018 2.31622243 2019 2.25762248 2020 2.27063942 2021 2.36492991