Year Percent of GDP (Units) 2000 42.550 2001 42.309 2002 41.801 2003 40.363 2004 39.593 2005 39.664 2006 40.676 2007 39.845 2008 37.777 2009 34.936 2010 36.037 2011 35.926 2012 35.140 2013 35.692 2014 36.032 2015 36.382 2016 36.152 2017 37.233 2018 35.631 2019 34.843 2020 34.105 2021 36.482 2022 37.208 2023 34.034 2024 35.656 2025 35.270 2026 35.465 2027 35.578 2028 35.779 2029 35.975