Year	% of GDP
1970	0.9435297779800637
1971	0.8975078781004258
1972	1.030621351238319
1973	1.5608582910653652
1974	1.2198796774820146
1975	1.3620185515342202
1976	1.2800706052353863
1977	1.6768152516072856
1978	1.5729718715475483
1979	1.5353853037230696
1980	1.4693357074460565
1981	1.040015853769444
1982	1.4481200957772535
1983	1.1004120973486593
1984	0.8325795554495018
1985	0.7240445260091914
1986	0.9977048525237376
1987	1.070503854083039
1988	0.8456474214028867
1989	0.8833012353009396
1990	0.8342719114258501
1991	0.908882390314501
1992	1.094126818452255
1993	0.96255355814673
1994	0.9077992075158762
1995	1.0683865518244027
1996	0.9629559136269724
1997	0.8275772685768461
1998	0.7980411908521159
1999	0.5816962784396043
2000	0.5203550382642022
2001	0.5046403431736609
2002	0.5596260039934984
2003	0.6887297741152539
2004	0.5004853984044725
2005	0.4484567118364638
2006	0.4458708626184072
2007	0.499324800230824
2008	0.5083353448252471
2009	0.4860185754103901
2010	0.45670224694618256
2011	0.4201871941094774
2012	0.4128187711222731
2013	0.40709616365884455
2014	0.4443903247882983
2015	0.4352186971043242
2016	0.45665620457931816
2017	0.4513229442028915
2018	0.3633414432534534
2019	0.3298358253590558
2020	0.3661882931255299
2021	0.30877448273269437