Year Percent of GDP (Units) 2000 36.719 2001 34.677 2002 26.328 2003 21.602 2004 16.176 2005 9.074 2006 2.288 2007 0.077 2008 -1.062 2009 0.533 2010 2.846 2011 4.969 2012 4.492 2013 6.477 2014 13.135 2015 15.445 2016 11.307 2017 10.343 2018 8.969 2019 8.408 2020 13.338 2021 12.679 2022 11.497 2023 13.323 2024 15.110 2025 16.962 2026 19.254 2027 20.921 2028 22.508 2029 23.965