Year	% of GDP
1970	17.004345736664
1971	19.6130299561807
1972	26.9274941459081
1973	32.5021042060303
1974	24.8759223266563
1975	29.0164220246222
1976	29.3251825334001
1977	30.9180140872899
1978	26.6754857541954
1979	38.5832711629996
1980	37.7832312516497
1981	26.4833420566088
1982	31.1968461324752
1983	29.7256370502483
1984	21.3305645463802
1985	21.7896848160812
1986	23.6510021336852
1987	28.6319143984632
1988	25.0794135493953
1989	28.3611314535947
1990	26.8807563305794
1991	21.2686939295695
1992	20.1890047327682
1993	17.3002755446405
1994	15.238434591052
1995	13.8761007648154
1996	12.7124864921089
1997	11.0799757813186
1998	10.095351709262
1999	10.0710448024694
2000	12.5675399788113
2001	10.666951361765
2002	9.81548671538781
2003	12.1560364817758
2004	11.9873010934205
2005	13.884276518626
2006	13.4761141533839
2007	12.628852352931
2008	13.3867719140126
2009	9.65215518287161
2010	9.61503786168569
2011	9.94490616865965
2012	9.20599203286687
2013	8.46715106760802
2014	8.64507399532146
2015	6.5709120658644
2016	5.20040474859063
2017	6.23600042741287
2018	7.32744449685636
2019	6.19635932474839
2020	4.54156531962687
2021	6.92196634868479