Year	% of GDP
1970	4.03007518796992
1971	3.7416851441241694
1972	3.2736572890025606
1973	3.00699300699301
1974	3.2078413900646003
1975	3.3354050134659197
1976	3.00623936471923
1977	2.9553264604811
1978	3.2396379228203904
1979	3.2390444086179104
1987	3.598332453848549
1988	3.947421531694368
1989	4.052839733829157
1991	2.7407564758479683
1992	2.818738233325618
1993	2.6585708288485557
1994	2.6777093037484767
1995	2.364451503214901
1996	2.2421843689232435
1997	2.249506056442406
1998	2.11615943346248
1999	1.9534597106321279
2000	1.860185078859238
2001	1.891435529697384
2002	1.8936333949342343
2003	1.8592478329299702
2004	1.7519888737434584
2005	1.7733338439407018
2006	1.693995506030056
2007	1.651370723013663
2008	1.529402973089564
2009	1.521047905099495
2010	1.4718448091400047
2011	1.4023837131255257
2012	1.3905345994770895
2013	1.3777716615359938
2014	1.4225848167150839
2015	1.5338352657669272
2016	1.4854600828880773
2017	1.535885194292686
2018	1.6285009239265689
2019	1.7575233534869004
2020	1.9097243416693317
2021	1.8803558039331214
2022	1.9229169946234828