Year Percent of GDP (Units) 1998 44.054 1999 34.460 2000 24.787 2001 21.046 2002 22.827 2003 22.190 2004 19.936 2005 17.738 2006 14.586 2007 14.579 2008 23.004 2009 37.168 2010 66.579 2011 78.968 2012 86.916 2013 90.110 2014 85.610 2015 65.556 2016 65.476 2017 58.649 2018 54.094 2019 48.911 2020 49.573 2021 44.459 2022 37.152 2023 37.407 2024 34.012 2025 30.470 2026 27.401 2027 24.883 2028 22.857 2029 20.947