Year Percent of GDP (Units) 1997 101.335 1998 108.037 1999 97.104 2000 97.230 2001 104.646 2002 105.078 2003 95.617 2004 91.770 2005 90.741 2006 74.498 2007 46.993 2008 47.598 2009 51.691 2010 52.520 2011 51.189 2012 44.297 2013 41.054 2014 38.284 2015 41.825 2016 43.844 2017 42.894 2018 47.033 2019 43.562 2020 51.082 2021 43.210 2022 25.106 2023 27.038 2024 31.153 2025 30.664 2026 28.017 2027 28.198 2028 27.843 2029 27.458