Year Percent of GDP (Units) 2000 9.951 2001 10.549 2002 10.528 2003 11.619 2004 11.655 2005 12.294 2006 11.405 2007 12.433 2008 13.100 2009 14.743 2010 15.782 2011 15.629 2012 15.602 2013 17.070 2014 17.931 2015 18.247 2016 20.129 2017 20.946 2018 22.166 2019 22.352 2020 22.245 2021 23.269 2022 23.134 2023 19.273 2024 19.556 2025 20.664 2026 21.420 2027 22.075 2028 22.675 2029 23.143