Year % of GDP 1995 7.375806358492404 1996 6.584926296560341 1997 6.241635969186708 1998 5.965048421414113 1999 5.783494705174266 2000 5.435248181352538 2001 5.202702096257012 2002 4.987113604828129 2003 4.999783600117432 2004 4.275407568149931 2005 4.284223523766378 2006 3.201238320289699 2007 3.037347756507604 2008 2.8072499077339392 2009 2.804954205727554 2010 2.9883328440952983 2011 3.1137516536591745 2012 3.441068645717918 2013 3.382602758505213 2014 3.5841335057166948 2015 3.864703147743261 2016 3.5153402483759684 2017 3.856388964531252 2018 3.6354084912526936 2019 3.8085892215836927 2020 4.100226414157665 2021 3.676790239984796 2022 3.764522392692756 2023 3.7851242813856487