Year Percent of GDP (Units) 1994 40.066 1995 36.566 1996 37.797 1997 43.918 1998 45.731 1999 41.757 2000 42.333 2001 47.664 2002 48.432 2003 40.420 2004 37.176 2005 31.562 2006 25.980 2007 22.157 2008 21.555 2009 21.716 2010 17.286 2011 16.278 2012 19.124 2013 24.890 2014 26.895 2015 29.931 2016 33.740 2017 32.484 2018 36.676 2019 40.593 2020 48.680 2021 52.576 2022 48.255 2023 52.113 2024 52.101 2025 51.982 2026 50.935 2027 47.749 2028 44.902 2029 42.213