Year Percent of GDP 1991 33.212 1992 31.832 1993 26.2 1994 24.355 1995 27.962 1996 24.457 1997 22.213 1998 27.887 1999 23.865 2000 25.446 2001 22.334 2002 22.336 2003 18.842 2004 18.514 2005 18.296 2006 20.105 2007 22.022 2008 27.016 2009 26.775 2010 27.117 2011 24.431 2012 23.395 2013 21.666 2014 28.547 2015 41.479 2016 36.913 2017 38.476 2018 32.625 2019 33.681 2020 33.408 2021 32.849 2022 32.731 2023 32.8 2024 32.671