Year	% of GDP
1968	4.934996098726391
1969	4.919251112233759
1970	4.227622117530375
1971	3.291249185718274
1972	2.8085680047932895
1973	2.1929824561403506
1974	0.8299424374751886
1975	0.915334589436577
1976	0.7745419137824201
1977	1.1475177901583429
1978	1.4996097056851039
1979	1.1842378264501061
1980	0.9536319309585097
1981	0.9718191691250899
1982	1.5523457457541296
1983	2.110296490158821
1984	2.7014076354855083
1985	3.6033354769104853
1986	4.842556362958823
1987	5.614290922347794
1988	6.230806700976343
1989	6.256283869883634
1990	5.636002497020601
1991	5.365365041924488
1992	5.542526792288184
1993	5.99861436044702
1994	6.085968828398159
1995	5.848701613203681
1996	5.3678026089254125
1997	5.351919605363504
1998	6.140717431432682
1999	5.654319725479397
2000	4.900933048723688
2001	5.134855673148776
2002	5.037537516420026
2003	4.471881761419732
2004	3.8683559332689534
2005	3.1854016709850983
2006	2.919961940954636
2007	2.7427674783667464
2008	2.2926907848092433
2009	2.830434331375531
2010	2.619073222275905
2011	2.155175811269893
2012	2.070931153365443
2013	2.170009678131385
2014	2.288633672513855
2015	2.772920528677597
2016	2.947027027027027
2017	2.86745262435524
2018	2.4816289091624406
2019	2.559547773370247
2020	2.9602504723958485
2021	2.675159429972072
2022	2.4049208795559838
2023	2.7149428640797555