Year Percent of GDP (Units) 1995 46.631 1996 46.708 1997 44.050 1998 43.370 1999 43.744 2000 44.306 2001 43.253 2002 42.197 2003 41.939 2004 42.131 2005 41.540 2006 42.098 2007 44.778 2008 44.962 2009 45.809 2010 44.386 2011 43.849 2012 46.791 2013 47.464 2014 47.271 2015 48.376 2016 45.001 2017 44.259 2018 44.039 2019 44.038 2020 43.861 2021 41.237 2022 42.595 2023 40.757 2024 42.318 2025 42.188 2026 42.393 2027 42.011 2028 42.715 2029 42.646