Year % of GDP 2000 2.12 2001 1.97 2002 1.93 2003 2.04 2004 2.32 2005 2.53 2006 2.31 2007 1.79 2008 2.27 2009 2.66 2010 1.84 2011 1.84 2012 2.07 2013 1.85 2014 2.13 2015 1.92 2016 2.04 2017 1.89 2018 1.71 2019 1.67 2020 2.47 2021 2.56