Year	% of GDP
1970	0.8635499361588265
1971	0.7921880345507188
1972	0.8724381906898685
1973	1.2825158936275103
1974	1.0876808383229744
1975	1.4820798018482961
1976	1.2111023927479287
1977	2.1064414560453444
1978	1.9403478058798935
1979	1.3842536719048282
1980	1.3548617932971094
1981	0.8962579540464539
1982	1.2581139849224827
1983	0.9629162818553075
1984	0.8757979906641988
1985	0.6863695529016567
1986	1.0469774778636733
1987	0.9709354285159792
1988	1.0432642341730414
1989	1.1067359382044741
1990	1.24763239163705
1991	1.3292967444376658
1992	1.31243598422414
1993	1.4021933459140905
1994	1.4375664164074433
1995	1.8675738856042978
1996	1.7035420386625506
1997	1.4901653530934915
1998	1.5336189187738754
1999	0.8256887078899052
2000	0.7633234431443705
2001	0.7437614542390275
2002	0.828651414939587
2003	1.0262965089917193
2004	0.7690393095954428
2005	0.6863606300393791
2006	0.6842460322514569
2007	0.7953001565022608
2008	0.8906805179810352
2009	0.8118540419179001
2010	0.7761137154431698
2011	0.7702151052471046
2012	0.7527695354741093
2013	0.7156331718879989
2014	0.7652840030189997
2015	0.7402999445829299
2016	0.7529353512899805
2017	0.7171713672310965
2018	0.5141072051834987
2019	0.4769639985418035
2020	0.5250604295099063
2021	0.47699221610617526