Year Percent of GDP (Units) 1995 18.241 1996 21.561 1997 22.058 1998 22.730 1999 23.710 2000 25.918 2001 26.062 2002 27.358 2003 26.777 2004 26.897 2005 26.399 2006 26.061 2007 22.848 2008 21.786 2009 34.526 2010 38.269 2011 46.458 2012 53.561 2013 70.006 2014 80.299 2015 82.588 2016 78.520 2017 74.150 2018 70.290 2019 65.358 2020 79.550 2021 74.368 2022 72.311 2023 68.497 2024 67.517 2025 67.067 2026 66.442 2027 65.746 2028 64.832 2029 63.373