Year % of GDP 1994 19.42127237317511 1995 19.5224426946535 1996 18.974321984416832 1997 17.689506367297692 1998 19.12376617011609 1999 18.69416832696336 2000 18.875249396189698 2001 18.14353786589935 2002 17.66434223777318 2003 18.337455549688855 2004 19.609956723128192 2005 19.273515343161936 2006 20.249222527937732 2007 21.278039919250283 2008 23.485167831567818 2009 23.284582565295718 2010 21.440147426872162 2011 22.401802407370955 2012 22.66016290650169 2013 23.31114900037365 2014 23.62289330739709 2015 23.474337707641883 2016 21.429110441876734 2017 21.60864872528917 2018 20.88048021111363 2019 21.469616605520496 2020 20.382308304168557 2021 20.10844699224815 2022 21.117890757509304 2023 20.114318903117443