Year	% of GDP
1970	1.4099286274854164
1971	1.1755841327748922
1972	1.1179674344767632
1973	1.3273519629450474
1974	1.2877661933827824
1975	1.6117197272574086
1976	1.499251092727927
1977	2.1208523486600237
1978	2.11470600275279
1979	1.961124284153512
1980	1.8255792689697103
1981	2.14941643418825
1982	3.060105433592502
1983	1.9713658140921049
1984	2.007280858504589
1985	2.1238074401923894
1986	2.706908309973054
1987	2.325286092234764
1988	2.4440761425118867
1989	2.4885174309010107
1990	2.5868062405664056
1991	2.3960252651795915
1992	3.2663752653975635
1993	2.842176754041357
1994	3.334586117168416
1995	4.276523773705335
1996	4.299241122471166
1997	3.8275628073114385
1998	4.115519510565323
1999	2.823536490363045
2000	2.6649300759714576
2001	2.852170260294208
2002	3.364174230024239
2003	3.92329610170674
2004	2.7380645641815193
2005	2.540887598014389
2006	2.3439508566260265
2007	2.8408023910268434
2008	3.1702135824592106
2009	3.1591187083001926
2010	2.377042183188166
2011	2.5027385503961703
2012	2.865461857841316
2013	3.0192365775335848
2014	3.267199783005181
2015	3.7190074504131174
2016	4.197585376610801
2017	3.654856641701671
2018	2.536792133124564
2019	2.467729792002778
2020	2.8982706112827663
2021	2.6352013186568466