Year	% of GDP
1970	0.036090156682827675
1971	0.038907418176146
1972	0.037798474847850067
1973	0.04240567943997874
1974	0.06937805250488066
1975	0.14147998917288027
1976	0.14703013741289056
1977	0.13154649927125045
1978	0.1761136551254837
1979	0.2786034055693813
1980	0.23841416563177117
1981	0.14351148505422176
1982	0.0519809686922251
1983	0.19616621463750247
1984	0.22700685889548314
1985	0.23627330132376378
1986	0.27187579699341935
1987	0.3187106057643943
1988	0.4210350664348016
1989	0.39936859550342135
1990	0.5151992923972242
1991	0.4133157813377147
1992	0.2849038345099626
1993	0.4319951283376776
1994	0.4006880109852932
1995	0.5062699204929745
1996	0.48899381913955153
1997	0.4954785357826982
1998	0.24849233740311008
1999	0.29013859905224565
2000	0.5834759924571329
2001	0.8266294785855708
2002	0.6903500999779745
2003	0.6990687214081741
2004	0.6060163360205657
2005	0.5690367330122462
2006	0.7276979260423515
2007	0.6113652623446062
2008	0.7691355596648546
2009	0.6190543109765724
2010	0.5091183932019269
2011	0.6401884866652078
2012	0.6214764329584179
2013	0.5916431131048179
2014	0.5000560653637668
2015	0.42537045846669286
2016	0.29027140898119574
2017	0.33310729272076306
2018	0.5191633468478335
2019	0.4517037902256137
2020	0.3307713063409989
2021	0.7336661255044564