Year Percent of GDP (Units) 1995 17.176 1996 17.962 1997 21.634 1998 23.922 1999 26.472 2000 19.346 2001 20.824 2002 25.712 2003 18.286 2004 19.331 2005 19.580 2006 18.739 2007 19.999 2008 19.226 2009 21.722 2010 22.009 2011 21.113 2012 22.251 2013 21.636 2014 22.186 2015 22.182 2016 21.350 2017 21.522 2018 21.352 2019 20.562 2020 24.886 2021 26.767 2022 24.517 2023 23.183 2024 23.802 2025 23.629 2026 23.747 2027 23.748 2028 23.753 2029 23.864