Year % of GDP 1992 28.27887517265466 1993 34.51643435828818 1994 31.812559389412996 1995 29.935389924507263 1996 29.254965693591885 1997 28.307494227472457 1998 29.855500977451833 1999 29.640939354674394 2000 29.693676095597553 2001 30.38912522969518 2002 31.78837160177082 2003 33.6183439988842 2004 34.6978989147626 2005 35.03283404006549 2006 34.67096983218092 2007 34.4689879976754 2008 34.92602646365924 2009 39.47490299564447 2010 39.49369820190279 2011 39.56073635897461 2012 39.98256402601041 2013 40.255541184156144 2014 39.56739008809824 2015 37.58426101981753 2016 37.059281583699914 2017 36.69177012824524 2018 38.058155751122904 2019 38.373510338358614 2020 36.965928607708236 2021 36.63155923061338