Year % of GDP 1992 24.31103385049596 1993 20.76815729689058 1994 25.070607066217534 1995 24.168329701983087 1996 24.531028291507116 1997 25.564029596724787 1998 25.882471647565286 1999 25.230715199791486 2000 25.551452963599345 2001 26.170836907007672 2002 25.804469817014713 2003 25.28184247212667 2004 25.681338143444727 2005 26.549483448659306 2006 28.429598531557094 2007 28.7258626260517 2008 27.413623026392752 2009 22.38673112918675 2010 21.909869662933996 2011 21.56764993944226 2012 20.367606216634172 2013 21.916232702969516 2014 24.44340168730388 2015 23.08999468612124 2016 23.45568899645995 2017 26.474063686997372 2018 27.31599405220827 2019 26.579097364392894 2020 27.349227566117033 2021 25.232652569431853 2022 23.467221110936233 2023 25.0052867984765