Year	% of GDP
1970	9.409861451699108
1971	8.870297461071145
1972	8.7124168504117
1973	8.042809919006942
1974	11.22542885272805
1975	8.557101565927526
1976	8.435385276702801
1977	9.04787632818103
1978	8.176236903544563
1979	6.983993799205191
1980	6.0370191897167125
1981	5.086381807546714
1982	5.424640219984897
1983	3.4362139574297483
1984	3.704573747121727
1985	3.3490835990451084
1986	2.8671129140604616
1987	2.2115361822525097
1988	1.9292306414740987
1989	2.2743680872260805
1990	2.400356931255955
1991	2.369553066521561
1992	2.266094651118362
1993	2.469573357615335
1994	2.7551969471526627
1995	2.7846616629148753
1996	2.8079418224128965
1997	2.0116535785412015
1998	1.2170135399287467
1999	1.239748537304487
2000	1.3867196592970157
2001	1.1320532541506605
2002	1.0169856778703954
2003	1.16952093575506
2004	1.5351914029734128
2005	2.083770927891014
2006	2.4389890398145626
2007	2.805112137436688
2008	3.3374306056589345
2009	2.946524638199956
2010	5.244944671653121
2011	7.089807429303935
2012	6.927527783405997
2013	5.324461429062202
2014	3.608017988924928
2015	1.899817909014094
2016	3.720745051157484
2017	3.9002248033568563
2018	1.8919389952365926
2019	1.6250467397990067
2020	2.9112143549351743
2021	8.269310338357759