Year % of GDP 1994 15.448289421942588 1995 20.411739023502072 1996 23.617706247982976 1997 27.83363490033526 1998 27.303197225460078 1999 27.643946778602736 2000 21.88381874547198 2001 22.068719648032573 2002 19.126012162673113 2003 20.58798523031563 2004 22.536242399315295 2005 24.31642289108027 2006 26.25834520154812 2007 27.10155544438264 2008 26.848068924193058 2009 25.00937878535689 2010 29.695542186820408 2011 32.03597181103982 2012 32.35054143794094 2013 33.743046819878174 2014 33.98912010824838 2015 35.11487563076115 2016 35.90870938660216 2017 40.324411173922286 2018 41.98456356283129 2019 40.04007111495333 2020 34.181492142048356 2021 42.5733214368127 2022 48.12588416425135 2023 44.12899198078148