Year	% of GDP
1970	0.6055343822221985
1971	0.5208694228084139
1972	0.5523864049511106
1973	0.5580069131618444
1974	0.5773315701438272
1975	0.40932015947281847
1976	0.2899428538672216
1977	0.3877198059105344
1978	0.4095821401005094
1979	0.3783386443469484
1980	0.34223956920518517
1981	0.3546262201944244
1982	0.3260635613284942
1983	0.368272116224764
1984	0.38088290235520283
1985	0.4041681345589566
1986	0.40021008750541975
1987	0.5290351579971289
1988	0.7303972155836765
1989	0.9590817897865858
1990	1.010514833248076
1991	0.9773599310098342
1992	0.8691015104273291
1993	1.0339274909284657
1994	1.0098510952104494
1995	1.3356315906232954
1996	1.3076234770770498
1997	1.5131748110158967
1998	2.7692017646039635
1999	5.726000326743409
2000	8.738424380249654
2001	4.968008951229718
2002	3.6536505902341436
2003	2.9551311873693717
2004	2.7483912668701524
2005	6.140006501939874
2006	7.172864185451102
2007	10.03232209400383
2008	5.084020031126293
2009	3.244571787392404
2010	3.70691282144508
2011	5.567628579483725
2012	3.8600773878309416
2013	4.034691727235561
2014	2.7639551588618496
2015	6.0299212776298905
2016	5.20303121745011
2017	3.5866282949982637
2018	-0.480495006849071
2019	3.2334675495530143
2020	1.475924518159624
2021	3.1996551353190674
2022	0.8972103802167556