Year % of GDP 1995 11.471432069618734 1996 16.856640399798415 1997 15.594395077183593 1998 17.36221341525367 1999 14.975165560031536 2000 17.808460129585978 2001 18.263997247347284 2002 17.47342057637679 2003 18.111348313674274 2004 19.94688583878819 2005 18.797165449186053 2006 20.30207046097486 2007 20.323094539088103 2008 18.805606247561677 2009 17.40622597817658 2010 17.869329566586327 2011 16.977981398393585 2012 15.597800886901819 2013 17.296414489108265 2014 18.176030735269986 2015 22.75733740435775 2016 22.16749900334152 2017 24.317639632281583 2018 24.21240033147703 2019 24.880022313456077 2020 22.904714936231503 2021 23.559544221308368 2022 23.94220286729825 2023 24.01279400177378