Year	% of GDP
1970	0.938482065611318
1971	0.9279052503320279
1972	1.0932979420839621
1973	1.7053288873680736
1974	1.2708974736246266
1975	1.2582651664578859
1976	1.2926768791474865
1977	1.4392436757276916
1978	1.3450173313355842
1979	1.5896799966851614
1980	1.5145494337123824
1981	1.0061448659922132
1982	1.3780286900297845
1983	1.0695448192014718
1984	0.7084237553523405
1985	0.6684099131963935
1986	0.8560733923423488
1987	1.0112270681708184
1988	0.9300167553486749
1989	0.925859216119172
1990	0.7745128190382079
1991	0.8793353819106453
1992	0.9100616191796262
1993	0.7708982048523562
1994	0.7005131011754094
1995	0.7521602541463042
1996	0.6490806801514849
1997	0.5325148584500983
1998	0.454330111692017
1999	0.393131356999014
2000	0.3418710743330679
2001	0.3351373233245381
2002	0.366811445836121
2003	0.4319907017767692
2004	0.2968023062404002
2005	0.27509184896560723
2006	0.29709655908436355
2007	0.32346530285406655
2008	0.33810990094740734
2009	0.30345955916438455
2010	0.3053870695942171
2011	0.25995710556651286
2012	0.24945733357381536
2013	0.24662121687509103
2014	0.27243390818291274
2015	0.22754979185726915
2016	0.24297748806799482
2017	0.25886254751032467
2018	0.23456800829339278
2019	0.20625704790194127
2020	0.22510462617449947
2021	0.17979994215228307