Year	% of GDP
1970	8.254051211096684
1971	9.14831395335593
1972	9.990993584587851
1973	12.716056492696895
1974	36.35455886234241
1975	30.29646974376586
1976	28.413916117383827
1977	26.917808931375337
1978	26.352902220754434
1979	30.854481427772814
1980	33.23651691012612
1981	23.526166747608087
1982	17.73602575783317
1983	16.157721614392752
1984	15.667562618509843
1985	14.726126780349949
1986	6.86090691475103
1987	11.794742647466085
1988	11.613289636706904
1989	17.052434393425578
1990	16.42029950032719
1991	12.595926023665942
1992	11.79295050975101
1993	15.873681284394667
1994	16.82357200880678
1995	14.771880132754248
1996	15.451825922276338
1997	14.202069668137153
1998	10.018442698611118
1999	13.537014058462825
2000	21.53937472504348
2001	17.690448248631665
2002	17.634295675410172
2003	18.385667950789113
2004	22.404375403111995
2005	28.325579188929797
2006	29.401698886808983
2007	26.474127935792144
2008	30.1241917799353
2009	18.870182187346433
2010	21.328871873047706
2011	24.207205837992266
2012	23.343523477128265
2013	22.436951467362803
2014	20.59841786519323
2015	12.473997566714976
2016	10.856010331268958
2017	15.060791952469463
2018	21.962978081792055
2019	18.28562457178376
2020	11.657512636441815
2021	19.823522742109617