Year Percent of GDP (Units) 1995 3.836 1996 2.894 1997 3.950 1998 0.694 1999 3.833 2000 2.452 2001 5.404 2002 11.939 2003 18.211 2004 20.715 2005 25.843 2006 31.155 2007 30.804 2008 29.585 2009 17.338 2010 15.797 2011 16.560 2012 12.797 2013 14.828 2014 13.275 2015 18.542 2016 17.059 2017 17.161 2018 15.171 2019 10.352 2020 15.666 2021 19.484 2022 22.408 2023 19.385 2024 18.240 2025 17.824 2026 16.961 2027 16.471 2028 15.773 2029 14.903