Year	% of GDP
1970	0.47473423524625774
1971	0.4167651620760349
1972	0.4405907572903321
1973	0.5754538677156273
1974	0.4967091394302818
1975	0.5970540348313251
1976	0.46438019927275753
1977	0.6180538019005686
1978	0.5646685671925055
1979	0.5847566778759311
1980	0.4694944128004188
1981	0.35268669952971604
1982	0.6925523748929852
1983	0.34244785853527987
1984	0.23651537919676494
1985	0.18034494551482222
1986	0.23694731834820787
1987	0.27853579230149395
1988	0.25306103916322664
1989	0.4958409347429637
1990	0.5654069741280857
1991	0.537823619694781
1992	0.5055235768977009
1993	0.4284521435923487
1994	0.3598308874979405
1995	0.441042579608434
1996	0.35162866520633385
1997	0.32294861344427567
1998	0.2829681423999397
1999	0.30676896530310493
2000	0.2273699286706116
2001	0.2355437426572189
2002	0.31149464973409235
2003	0.33233878520718674
2004	0.2631133590367844
2005	0.23640754925478738
2006	0.271552822444968
2007	0.27947268462548097
2008	0.27208223367481843
2009	0.2866996786157198
2010	0.37294754794375934
2011	0.31661440039099087
2012	0.31636204267375595
2013	0.36091885220194525
2014	0.3756984148379899
2015	0.44462872631356376
2016	0.5263399528840624
2017	0.4986631121118443
2018	0.4836400091598893
2019	0.4136139279890571
2020	0.5564188545756932
2021	0.4278667074683655