Year % of GDP 1995 15.938528577970773 1996 16.57597697531142 1997 16.528926338617364 1998 15.998066551746643 1999 15.629989489002833 2000 15.049337323382893 2001 14.677864613509254 2002 14.1946649466386 2003 13.476337141878265 2004 13.052712255974756 2005 12.56677653381427 2006 12.343198069530287 2007 12.243633231156718 2008 11.901652716380768 2009 11.133165360096784 2010 11.601265868347467 2011 11.343060378070344 2012 11.394090833134175 2013 11.545609144306713 2014 11.791451475022281 2015 12.138708774241735 2016 12.153385151964146 2017 12.342507964262415 2018 12.262352714969312 2019 11.895295721107283 2020 12.018126933387348 2021 12.365192409616096 2022 12.246991334228849 2023 11.946818911652558