Year % of GDP 1995 7.178038555068181 1996 7.262480334666938 1997 6.322284301651695 1998 6.036502790721815 1999 5.310423692417628 2000 4.934459877520743 2001 4.914388876983121 2002 4.260795042566308 2003 3.9018743899310877 2004 4.352408489242024 2005 3.721386436253102 2006 3.5356111700567445 2007 3.4865572072424493 2008 3.4529685638987 2009 3.0564452563529816 2010 3.034168376290377 2011 3.9952376817572457 2012 3.891089968348392 2013 3.9170855283769193 2014 3.93604186130972 2015 3.7895636442998355 2016 3.89013448518016 2017 3.754197638956748 2018 3.486371748399452 2019 3.3324071158255935 2020 3.3890532075959787 2021 3.4564745856157137 2022 3.1057570484942127 2023 4.690144134621212