Year	% of GDP
1970	13.38227689776581
1971	13.312508952245684
1972	13.945356438857733
1973	15.743767847384554
1974	19.14628924120823
1975	18.10666575189831
1976	18.45789990153594
1977	18.922912020408205
1978	19.693959082810824
1979	21.267206404235264
1980	22.945072076811158
1981	22.21576496825502
1982	20.01951078147675
1983	19.23061464473462
1984	20.506717592156843
1985	19.69781961765704
1986	19.985840156296494
1987	20.781887118081688
1988	21.827425336864543
1989	22.03206126112997
1990	22.39170899047086
1991	22.299707349674442
1992	22.74990403494248
1993	23.30656682367831
1994	24.755385992279525
1995	26.43268770657665
1996	26.748736180680492
1997	27.77474994876274
1998	27.54345291924674
1999	28.163136652998638
2000	30.02605505980556
2001	27.695136153639503
2002	26.847305866123076
2003	26.65820814659699
2004	28.353596285602926
2005	29.405462032288284
2006	30.482327237224222
2007	31.279532581314076
2008	33.04005882049158
2009	27.638018635630292
2010	30.965421993854235
2011	33.55936963498852
2012	33.41993241945201
2013	32.71256531510903
2014	32.86418126445428
2015	30.98728257295818
2016	29.78897066918838
2017	30.381537114261885
2018	30.803772865326994
2019	29.699921937889297
2020	26.36773701390668
2021	28.44153120270229
2022	30.51433346684746