Year Percent of GDP (Units) 1994 20.872 1995 22.646 1996 19.394 1997 20.300 1998 20.191 1999 21.933 2000 22.247 2001 21.348 2002 20.523 2003 20.001 2004 18.935 2005 20.015 2006 22.362 2007 24.915 2008 23.068 2009 21.816 2010 22.344 2011 21.613 2012 21.394 2013 21.047 2014 19.431 2015 19.006 2016 19.405 2017 19.299 2018 19.079 2019 17.779 2020 17.274 2021 17.293 2022 17.357 2023 18.191 2024 17.750 2025 17.780 2026 17.922 2027 17.954 2028 17.980 2029 18.002