Year Percent of GDP 1991 35.587 1992 29.42 1993 30.729 1994 30.099 1995 26.06 1996 28.328 1997 22.848 1998 26.516 1999 24.736 2000 21.598 2001 25.229 2002 21.333 2003 20.05 2004 17.707 2005 15.744 2006 15.627 2007 17.655 2008 21.95 2009 34.997 2010 32.231 2011 31.171 2012 29.141 2013 30.327 2014 33.127 2015 32.36 2016 30.882 2017 30.414 2018 30.214 2019 31.374 2020 30.59 2021 29.249 2022 28.522 2023 27.672 2024 26.863