Year	% of GDP
1970	0.6225986554759544
1971	0.580299127201384
1972	0.5959912646111646
1973	0.8863812922130485
1974	0.6560809058767562
1975	0.7665729711441616
1976	0.6198808771584456
1977	0.9602209852089858
1978	0.864643253416165
1979	0.6802960547289991
1980	0.6384930749148133
1981	0.5182658253376992
1982	0.7519427140272763
1983	0.5112691146929194
1984	0.4171981169013206
1985	0.3506465891778221
1986	0.5118668601188439
1987	0.5474572674823764
1988	0.5255598703881128
1989	0.5466043736056941
1990	0.5441503355012245
1991	0.5542574733063346
1992	0.5441358491773327
1993	0.4540977811680071
1994	0.4696187021508028
1995	0.5896950319148377
1996	0.5354425903427509
1997	0.4618448157324424
1998	0.46421144433204214
1999	0.3471267563562734
2000	0.2976399591377479
2001	0.30043034537200797
2002	0.35952044799306077
2003	0.43248083356805983
2004	0.31916671840541994
2005	0.2830383595746574
2006	0.3033147854865765
2007	0.33871852325586504
2008	0.37512141179738057
2009	0.36057575994818264
2010	0.3613865560832467
2011	0.3408879819764641
2012	0.3323422003084882
2013	0.3376092260337917
2014	0.3777821693422126
2015	0.3806995960414397
2016	0.39859324712754207
2017	0.3751035362221963
2018	0.28679084170779495
2019	0.275382515497949
2020	0.323893938810642
2021	0.2733141914981344