Year Percent of GDP 1990 29.736 1991 27.184 1992 25.545 1993 26.542 1994 20.501 1995 21.417 1996 18.423 1997 16.64 1998 18.048 1999 17.452 2000 18.211 2001 16.681 2002 18.688 2003 21.73 2004 25.344 2005 22.587 2006 26.55 2007 36.455 2008 38.458 2009 32.843 2010 37.207 2011 38.696 2012 33.75 2013 31.351 2014 28.143 2015 21.866 2016 14.968 2017 14.024 2018 13.715 2019 13.637 2020 13.52 2021 13.373 2022 13.706 2023 13.681 2024 13.665