Year % of GDP 1993 29.0093668015141 1994 30.192416856605902 1995 32.07836000765011 1996 29.827123202074507 1997 27.659266621863026 1998 28.528225924600864 1999 28.483972983390665 2000 27.04095640235527 2001 28.688520098685462 2002 28.881695121225253 2003 28.977077523737115 2004 29.55994265268942 2005 31.968594906494857 2006 31.825571614269755 2007 34.12893623431256 2008 36.54198522489983 2009 35.602168557338466 2010 32.93079234067684 2011 34.69332051342952 2012 35.835966008382606 2013 36.12571567316426 2014 34.19390392556807 2015 32.02843951820561 2016 28.165105909453963 2017 28.32680894289976 2018 30.692658874724998 2019 28.60642177886471 2020 26.57955212177039 2021 28.77827225470338 2022 31.827827947569087 2023 27.925031866074608