Year	% of GDP
1970	3.725055279028394
1971	3.579139137407867
1972	3.7352371080310403
1973	5.100862099724017
1974	12.601233514966399
1975	10.074186120588116
1976	10.077804168213664
1977	11.973167529613583
1978	9.668429296621937
1979	18.527275546192673
1980	15.310769286071533
1981	7.017312263708711
1982	6.308761208945905
1983	7.3131103746927
1984	7.1606245242953905
1985	9.114635926208866
1986	6.9233444621339295
1987	7.467293170460807
1988	7.628752164881165
1989	9.75155731683593
1990	9.886991945546612
1991	7.867315893959887
1992	8.846201771609365
1993	11.114407745064778
1994	11.266784145667362
1995	12.33104712212981
1996	13.111585273964359
1997	11.695633518065078
1998	8.502691928705786
1999	6.765285191963967
2000	10.929388351340508
2001	9.593336789476856
2002	9.349773988829888
2003	9.17632210671452
2004	10.059121611117417
2005	12.487260745686338
2006	12.926556221751637
2007	13.965092471908955
2008	18.041635085965133
2009	10.484934941993544
2010	12.696437265266859
2011	15.277910900312795
2012	13.4168401964687
2013	11.491585899350031
2014	9.507626351995434
2015	6.318018581625475
2016	6.752511738462646
2017	8.232603139876666
2018	8.46555413838833
2019	7.51302796031938
2020	6.03190128966922
2021	9.981303556637481