Year	% of GDP
1970	1.9103775796357556
1971	1.746123825587878
1972	1.938748135771711
1973	2.647339651137038
1974	2.024804038631794
1975	2.2456591457988226
1976	1.857501997250426
1977	1.949102267060376
1978	1.8168713506329193
1979	2.237211418069984
1980	1.9425640547425878
1981	1.5993345537073036
1982	2.398679176796598
1983	1.2516952691299774
1984	0.6877420643039237
1985	0.6101682003027425
1986	0.6161883040710074
1987	0.6726628160910852
1988	0.6205914153845157
1989	0.6547114077636327
1990	0.7774808661716305
1991	0.8228456895601696
1992	0.8480267316099397
1993	0.9237517550592851
1994	1.0176953038737142
1995	1.3667985161319454
1996	1.1682275107262885
1997	0.9348450808789326
1998	0.6183559264380937
1999	0.5286631770534743
2000	0.36567957506343496
2001	0.3829997576047207
2002	0.36421871616719614
2003	0.41395504338522615
2004	0.4391792673473917
2005	0.4419069929734572
2006	0.5879015861204886
2007	0.6095294444948046
2008	0.6196997320232795
2009	0.628442117088069
2010	1.0232414742825733
2011	0.9523301088726324
2012	0.8862956177934129
2013	1.0461201049743798
2014	0.9801757389844665
2015	0.844133862638162
2016	0.9256093180059168
2017	0.9313605885696096
2018	0.8900794692923617
2019	0.7306725347378913
2020	0.8556459947218018
2021	0.6491915331073345