Year	% of GDP
1972	12.88750380767158
1973	11.92263853961247
1974	12.814674256799494
1975	14.577563640502294
1976	15.974794096512076
1977	15.788823146909142
1978	16.235663598958435
1979	16.591414806973578
1980	16.961568378682497
1981	17.181466404132895
1982	17.237888092503308
1983	16.771420723530078
1984	15.919064832875904
1985	15.588388477437231
1986	15.265211320395627
1987	15.209806586478965
1988	15.451245832896673
1989	15.381015163888451
1990	15.622553678220868
1991	14.825072964449602
1992	15.446377613669773
1993	15.810899948696195
1994	16.033841136514095
1995	16.21597624470009
1996	16.903503691243106
1997	16.7416418174257
1998	17.748832172129127
1999	17.923037502557264
2000	20.663003518537387
2001	20.065003557884324
2002	19.8083688216741
2003	20.088768338776998
2004	19.291330889287913
2005	19.692311163073327
2006	20.49362495978775
2007	21.658701125359997
2008	21.365881011058153
2009	20.36564211540454
2010	20.09507571083626
2011	20.692342029574842
2012	26.65220343370659
2013	26.115129731491287
2014	24.9884443554289
2015	24.81399025510512
2016	25.75718742280723
2017	26.184680050508845
2018	27.448923278324287
2019	27.880161627104904
2020	27.902502047910005
2021	29.933766809109418
2022	32.00416444080956