Year % of GDP 1990 44.34506062413039 1991 28.472832224871375 1992 17.06695896063703 1993 12.455403813285098 1994 20.23628063018805 1995 16.153955432999123 1996 17.88451094525105 1997 16.204193659293303 1998 16.215975968932003 1999 16.419569176011088 2000 21.714000149126626 2001 20.837446576035855 2002 24.8429527013295 2003 27.08676190771054 2004 28.107827404285256 2005 35.094190690196704 2006 41.8506802488286 2007 43.50453185635818 2008 46.83331578960939 2009 42.88387857212656 2010 39.37510944084288 2011 30.73674485942836 2012 23.598835615611584 2013 21.212512003257853 2014 19.99505739344542 2015 20.612561595478436 2016 17.357719658433048 2017 17.648375998583735 2018 16.740910872517414 2019 15.81559843197686 2020 17.77392125201067 2021 21.20394186439964 2022 20.265859806852617 2023 20.76311448527276