Year % of GDP 1994 31.687466922718006 1995 32.17881468505831 1996 32.18174389680347 1997 28.241288912799728 1998 29.9299404712685 1999 29.695773171747796 2000 26.949863893238803 2001 27.55157887605434 2002 31.376917185813813 2003 30.79565676624785 2004 32.76183719615233 2005 34.26853288807412 2006 33.70564617942282 2007 33.884587629486404 2008 34.918335491442804 2009 32.53611098371281 2010 32.88917810163476 2011 33.55377534421569 2012 34.92202399669949 2013 36.72510612581136 2014 35.17864350430395 2015 31.431730300522077 2016 31.69090922875596 2017 32.499988811771644 2018 34.89763074329147 2019 32.89445766797214 2020 30.827068494803093 2021 33.96047784218879 2022 35.94124293898174 2023 30.587377969768493