Year Percent of GDP (Units) 2000 133.914 2001 113.505 2002 73.736 2003 57.968 2004 47.717 2005 33.464 2006 18.729 2007 21.043 2008 31.378 2009 56.302 2010 37.163 2011 29.558 2012 26.691 2013 33.149 2014 39.810 2015 57.093 2016 75.663 2017 69.323 2018 92.995 2019 113.554 2020 138.708 2021 83.734 2022 64.840 2023 84.472 2024 70.342 2025 61.755 2026 54.759 2027 48.219 2028 43.979 2029 41.259