Year Percent of GDP (Units) 1998 96.567 1999 107.807 2000 111.429 2001 99.449 2002 98.297 2003 69.760 2004 49.412 2005 45.843 2006 36.807 2007 34.269 2008 30.229 2009 36.940 2010 36.838 2011 35.512 2012 32.462 2013 29.292 2014 27.892 2015 35.019 2016 42.179 2017 46.300 2018 46.585 2019 43.495 2020 51.762 2021 42.097 2022 32.124 2023 30.931 2024 30.755 2025 30.206 2026 29.419 2027 28.850 2028 29.144 2029 29.626