Year	% of GDP
1970	0.4969276047502501
1971	0.46697853382254784
1972	0.4233707464545958
1973	0.4594762555110855
1974	0.4857315981192098
1975	0.4659975021357181
1976	0.32254354876173946
1977	0.38666313568348154
1978	0.4064152175748173
1979	0.4281418679188097
1980	0.4907152400028638
1981	0.6171227116950632
1982	0.5820428081596561
1983	0.4642112829408189
1984	0.4981277960747759
1985	0.35303230510293077
1986	0.5693146639912743
1987	0.8489347351662845
1988	0.8954750793673775
1989	1.0295787264869727
1990	1.0932740590167713
1991	0.763142406019946
1992	0.7384895872463282
1993	0.9013223007182448
1994	0.9990931004448276
1995	1.1710795123412616
1996	1.3120639193374632
1997	1.6701552839380325
1998	2.4822524393472407
1999	3.657535369759115
2000	4.6086299916156745
2001	2.6602881636466007
2002	2.1399399831112724
2003	1.859091894344346
2004	2.224744052267085
2005	3.2624177173413322
2006	4.225639454893088
2007	5.292704503478017
2008	3.7419960845462965
2009	2.2617156083053964
2010	2.807342258534765
2011	3.138238634052536
2012	2.644611911800592
2013	2.6661930173089425
2014	2.375488788727807
2015	3.595413434440192
2016	3.5392256306151735
2017	2.6639995969943406
2018	0.9994585340504254
2019	2.077461965203018
2020	1.4026785835815734
2021	2.3214208237061067
2022	1.7434294795282692