Year Percent of GDP (Units) 1995 51.160 1996 50.911 1997 49.223 1998 46.533 1999 42.869 2000 39.571 2001 34.972 2002 36.470 2003 35.212 2004 31.748 2005 25.391 2006 16.173 2007 11.363 2008 7.842 2009 11.492 2010 15.033 2011 15.119 2012 18.540 2013 18.303 2014 18.076 2015 16.171 2016 17.496 2017 15.812 2018 13.360 2019 12.333 2020 14.858 2021 9.463 2022 5.181 2023 2.510 2024 1.017 2025 0.209 2026 0.037 2027 0.086 2028 0.284 2029 0.665