Year	% of GDP
1968	21.107472726278832
1969	21.03680793995571
1970	23.103318837675545
1971	22.19807778051694
1972	21.26267305511259
1973	11.587554538066078
1974	29.071698635464017
1975	25.422115585059995
1976	31.81598349823475
1977	33.03115703422646
1978	37.10799486137593
1979	29.222802908691726
1980	26.82568805950621
1981	27.438841030037015
1982	30.5894210161566
1983	28.798530609782386
1984	28.30392677431052
1985	24.772576906974184
1986	24.5820788017731
1987	21.807557225461167
1988	22.793538893092077
1989	18.036676103657
1990	30.508102579549558
1991	21.554502893264537
1992	22.589466197122512
1993	22.98220641355058
1994	21.29665952714142
1995	21.981364191506515
1996	21.03219550356783
1997	18.8102400915898
1998	22.11323456292194
1999	21.753773473284692
2000	19.737831947391832
2001	21.380232842529654
2002	20.871337140120712
2003	21.647678192154533
2004	21.40018272428224
2005	21.30403297177284
2006	22.50017683421465
2007	25.344443240726726
2008	26.299594154679035
2009	28.226886180688236
2010	26.27907359756537
2011	24.35703648547295
2012	23.69650381800463
2013	24.470813866591804
2014	25.63009592217542
2015	28.31262431920363
2016	28.365664524369492
2017	27.714921226485355
2018	26.515668117099946
2019	26.68082056012676
2020	25.57202757238311
2021	24.049056097527092
2022	23.560704113561673