Year Percent of GDP (Units) 1997 90.523 1998 95.031 1999 83.295 2000 81.880 2001 89.563 2002 90.267 2003 81.310 2004 81.503 2005 79.442 2006 61.648 2007 35.594 2008 36.436 2009 37.956 2010 38.731 2011 40.136 2012 35.023 2013 32.768 2014 33.412 2015 38.209 2016 39.981 2017 39.536 2018 42.269 2019 40.757 2020 48.219 2021 38.497 2022 23.637 2023 24.916 2024 30.700 2025 30.259 2026 27.675 2027 27.867 2028 27.524 2029 27.151