Year Percent of GDP (Units) 1995 16.216 1996 16.904 1997 16.742 1998 17.749 1999 17.923 2000 20.663 2001 20.065 2002 19.808 2003 20.089 2004 19.291 2005 19.862 2006 20.693 2007 22.181 2008 21.557 2009 20.598 2010 20.304 2011 20.865 2012 21.370 2013 20.731 2014 20.358 2015 20.260 2016 21.134 2017 21.826 2018 22.946 2019 22.923 2020 22.862 2021 25.719 2022 27.076 2023 23.877 2024 23.888 2025 24.444 2026 24.434 2027 24.429 2028 24.428 2029 24.430