Year Percent of GDP (Units) 2000 37.929 2001 38.045 2002 31.801 2003 31.514 2004 30.733 2005 29.637 2006 28.030 2007 24.326 2008 24.045 2009 26.995 2010 31.185 2011 34.742 2012 37.408 2013 40.356 2014 43.253 2015 45.195 2016 47.134 2017 48.588 2018 51.536 2019 56.101 2020 68.863 2021 68.797 2022 71.121 2023 73.929 2024 75.439 2025 77.856 2026 79.979 2027 81.900 2028 83.810 2029 85.728