Year	% of GDP
1970	8.254051211096684
1971	9.14831395335593
1972	9.990993584587851
1973	12.716056492696897
1974	36.354558862342415
1975	30.29646974376587
1976	28.413916117383827
1977	26.917808931375337
1978	26.352902220754434
1979	30.85448142777282
1980	33.23651691012612
1981	23.526166747608087
1982	17.73602575783317
1983	16.157721614392752
1984	15.667562618509843
1985	14.726126780349945
1986	6.860906914751029
1987	11.794742647466085
1988	11.613289636706906
1989	17.052434393425578
1990	16.42029950032719
1991	12.595926023665944
1992	11.79295050975101
1993	15.873681284394667
1994	16.821770979178407
1995	14.769507395388516
1996	15.450113987707418
1997	14.081187492216204
1998	9.931823278078925
1999	13.419973991681815
2000	21.35780553643221
2001	17.55846501834371
2002	17.51226599375105
2003	18.25488975505824
2004	22.245096672784754
2005	28.134193302733763
2006	29.22460741758212
2007	26.332377227142572
2008	29.958164430032816
2009	18.756842367577267
2010	21.19273925346118
2011	24.054381621233315
2012	23.194691497797812
2013	22.266900901164778
2014	20.43608168316916
2015	12.368159987890696
2016	10.755730227939084
2017	14.913933377173977
2018	21.740564970652905
2019	18.09445704800927
2020	11.55171479566296
2021	19.632967596811763