Year	% of GDP
1970	4.04328012466431
1971	3.35391998291016
1972	3.9828200340271
1973	3.48574995994568
1974	3.81979990005493
1975	4.15451002120972
1976	4.31272983551025
1977	4.28096008300781
1978	3.60597991943359
1979	3.64254999160767
1980	3.53567004203796
1981	3.43179988861084
1982	3.41850996017456
1983	3.55090999603271
1984	3.46870994567871
1985	3.52146005630493
1986	3.34574007987976
1987	3.87012004852295
1994	3.47054004669189
1995	3.94780993461609
1996	4.09431982040405
1997	3.84711003303528
1999	4.56723022460938
2000	4.75968980789185
2001	4.10587978363037
2002	4.19163990020752
2003	4.16870021820068
2004	3.5786600112915
2008	3.50229001045227
2011	3.15900993347168
2014	2.81699991226196
2015	3.02900004386902
2016	3.07800006866455
2017	2.97699999809265
2018	2.91199994087219
2019	3.09299993515015
2020	3.62199997901917
2021	3.26900005340576
2022	3.88700008392334