Year % of GDP 1999 2.56853008270264 2000 2.5141850709915152 2001 2.47150993347168 2002 2.59386992454529 2004 2.803959965705875 2005 2.6566801071167 2006 2.560960054397585 2008 2.55433988571167 2009 3.0046350955963153 2010 3.24651002883911 2011 2.97169005870819 2012 2.981799960136415 2013 3.306080102920535 2014 3.1727499961853 2015 3.2558000087738 2016 2.934885025024415 2017 3.6326149702072152 2018 3.26730489730835 2019 3.44067001342773 2020 3.45700001716614 2021 3.11500000953674 2022 3.13899993896484