Year	% of GDP
1970	3.7238127845478046
1971	3.5779726646066954
1972	3.7338535866495755
1973	5.099053390775383
1974	12.599554902905453
1975	10.072873315098976
1976	10.076678808608552
1977	11.971358121533815
1978	9.666515320390916
1979	18.524267126234072
1980	15.300832984265025
1981	7.0140502002413205
1982	6.30567045565458
1983	7.3090655354014515
1984	7.155967189878437
1985	9.107415006000384
1986	6.916863825038972
1987	7.45995661340482
1988	7.620846488621537
1989	9.740840880339888
1990	9.87603646820037
1991	7.8591719244082
1992	8.83475632385289
1993	11.09913001827242
1994	11.251231670318502
1995	12.317093511850956
1996	13.098392986443413
1997	11.683122008252852
1998	8.492890452986181
1999	6.754035798304359
2000	10.912438091811273
2001	9.577620927165269
2002	9.334019437694604
2003	9.163923952823467
2004	10.04604922484531
2005	12.47236502261514
2006	12.912116352498504
2007	13.95167086229948
2008	18.0278959290764
2009	10.477734163608115
2010	12.687905229310559
2011	15.26804140089881
2012	13.408260864939027
2013	11.48314563928283
2014	9.500668176122822
2015	6.312669591716211
2016	6.745625689430197
2017	8.22420712836814
2018	8.457165131207736
2019	7.50542656247327
2020	6.0271267230572185
2021	9.973684815521136