Year Percent of GDP 1996 1.611 1997 1.456 1998 1.236 1999 0.799 2000 0.637 2001 2.985 2002 4.892 2003 4.944 2004 7.017 2005 9.366 2006 10.223 2007 10.421 2008 11.533 2009 13.678 2010 15.588 2011 13.668 2012 16.471 2013 14.624 2014 18.601 2015 16.752 2016 11.767 2017 10.397 2018 12.212 2019 12.947 2020 13.563 2021 14.106 2022 14.734 2023 15.019 2024 15.081