Year	% of GDP
1971	0.1296312396571353
1972	0.12734598053372664
1973	0.13055581655772447
1974	0.34244763749841
1975	1.0069750348448139
1976	1.0150723509086672
1977	1.0115219200872092
1978	0.8805579165331279
1979	0.7568034324647555
1980	0.9945075323767445
1981	1.5957604118809785
1982	1.861153108868599
1983	1.013650885290265
1984	0.7880942346490778
1985	0.9065282256185344
1986	0.5472731424587107
1987	0.21472375388994713
1988	0.37307240102407146
1989	0.44068823592392364
1990	0.5479945884162923
1991	0.52095786029668
1992	0.3718487532532741
1993	0.18598754730046144
1994	0.146351751126999
1995	0.2630283444869222
1996	0.18006039188669334
1997	0.14437046287062133
1998	0.1392764791906593
1999	0.09006787981506843
2000	0.13473639355358952
2001	0.3876415231127566
2002	0.19876457269919198
2003	0.1874297843842701
2004	1.0297288677810592
2005	0.7615050234809642
2006	0.7589408700663819
2007	0.871637095835689
2008	2.1348338300090695
2009	0.8623134145386139
2010	1.2913767356634303
2011	1.6730301896034419
2012	0.9259931565951263
2013	0.6103143671551085
2014	0.4815001807403504
2015	0.3169155367741125
2016	0.34364158865208605
2017	0.43636727372129036
2018	0.5025528062214933
2019	0.38402273044088875
2020	0.31865716437230457
2021	0.5530128715180169