Year Percent of GDP 1989 17.966 1990 14.879 1991 14.149 1992 15.69 1993 15.813 1994 16.391 1995 17.581 1996 18.003 1997 17.989 1998 17.388 1999 17.343 2000 16.331 2001 16.644 2002 16.337 2003 17.239 2004 17.295 2005 17.241 2006 17.576 2007 21.912 2008 19.829 2009 20.166 2010 18.862 2011 18.787 2012 19.161 2013 18.489 2014 17.185 2015 17.299 2016 15.349 2017 18.61 2018 18.609 2019 19.224 2020 19.362 2021 19.48 2022 19.48 2023 19.38 2024 19.37