Year % of GDP 1990 30.75051892070161 1991 30.720215263378098 1992 29.511847642073093 1993 28.968150863346043 1994 30.340049676007474 1995 34.32032653113622 1996 34.83360292395625 1997 36.19895177888043 1998 14.298884600103321 1999 13.4955787795798 2000 15.06490024726175 2001 17.926337991010648 2002 19.11776926867868 2003 20.38740438795185 2004 22.940568640758613 2005 24.403358736173026 2006 24.385780880632346 2007 24.254073739215546 2008 27.392199854960396 2009 27.211607888327126 2010 23.591862350840138 2011 21.838473776542013 2012 21.627004247381613 2013 23.029384334676664 2014 24.582071384821784 2015 26.21083524594308 2016 31.007649115879847 2017 31.610536013546632 2018 32.0092383498909 2019 33.55840669795113 2020 37.740236840626714 2021 37.957440214227596 2022 36.83450935210978 2023 38.02873092230925