Year Percent of GDP (Units) 1998 9.552 1999 14.421 2000 14.719 2001 17.460 2002 14.888 2003 14.318 2004 14.074 2005 11.468 2006 9.580 2007 8.081 2008 17.908 2009 35.619 2010 46.518 2011 44.504 2012 42.726 2013 40.350 2014 41.605 2015 37.055 2016 40.380 2017 38.981 2018 36.990 2019 36.663 2020 42.216 2021 44.043 2022 41.544 2023 43.461 2024 43.163 2025 42.932 2026 42.593 2027 41.804 2028 41.038 2029 40.167