Year Percent of GDP (Units) 2000 55.535 2001 60.319 2002 65.184 2003 64.851 2004 61.659 2005 61.334 2006 58.625 2007 23.818 2008 25.516 2009 18.791 2010 19.613 2011 15.458 2012 18.639 2013 19.615 2014 16.102 2015 12.086 2016 15.769 2017 19.119 2018 20.609 2019 24.024 2020 18.051 2021 16.968 2022 17.126 2023 19.285 2024 19.760 2025 19.790 2026 19.816 2027 19.838 2028 19.858 2029 19.874