Year Percent of GDP (Units) 2000 39.476 2001 44.037 2002 41.013 2003 38.428 2004 34.560 2005 32.112 2006 34.028 2007 33.445 2008 34.191 2009 37.889 2010 35.924 2011 33.169 2012 34.139 2013 33.693 2014 32.812 2015 32.865 2016 34.102 2017 32.837 2018 34.045 2019 34.862 2020 34.112 2021 30.822 2022 27.700 2023 33.852 2024 35.390 2025 33.402 2026 32.749 2027 32.821 2028 32.905 2029 32.831