Year Percent of GDP 1988 30.733 1989 29.667 1990 30.546 1991 33.125 1992 34.115 1993 34.2 1994 33.819 1995 33.777 1996 33.633 1997 32.883 1998 34.724 1999 36.3 2000 35.315 2001 35.751 2002 35.009 2003 35 2004 34.954 2005 34.681 2006 34.639 2007 34.382 2008 35.112 2009 37.844 2010 37.027 2011 36.299 2012 36.556 2013 36.499 2014 36.832 2015 37.356 2016 37.351 2017 36.428 2018 36.828 2019 37.396 2020 36.636 2021 35.773 2022 35.561 2023 35.569 2024 35.594