Year Percent of GDP 1995 3.836 1996 2.894 1997 3.95 1998 0.693 1999 3.833 2000 2.451 2001 5.404 2002 11.938 2003 18.211 2004 20.714 2005 25.843 2006 31.155 2007 30.804 2008 29.585 2009 17.338 2010 15.797 2011 16.56 2012 12.798 2013 13.422 2014 13.244 2015 18.364 2016 16.614 2017 17.815 2018 15.448 2019 18.608 2020 19.411 2021 19.399 2022 19.771 2023 19.767 2024 19.915