Year	% of GDP
1970	3.4297399520874
1971	3.17421007156372
1972	3.35917997360229
1973	3.23003005981445
1974	4.24204015731812
1975	4.42854022979736
1976	4.42470979690552
1977	4.43521022796631
1978	4.34511995315552
1979	4.2811598777771
1980	4.30769014358521
1981	4.73072004318237
1982	4.85202980041504
1983	4.85234022140503
1984	4.86753988265991
1985	4.85157012939453
1986	4.70795011520386
1987	4.62343978881836
1988	4.54472017288208
1989	4.45639991760254
1990	4.51393985748291
1991	4.84130001068115
1992	4.73539018630981
1993	5.42959022521973
1994	5.62643003463745
1995	5.79072999954224
1996	5.75672006607056
1998	5.68792009353638
2005	5.51722764968872
2006	5.47531032562256
2007	5.30000019073486
2008	5.3899998664856
2009	5.67000007629395
2010	5.6399998664856
2011	5.48000001907349
2012	5.48999977111816
2013	5.48999977111816
2014	5.48999977111816
2015	5.44999980926514
2016	5.40999984741211
2017	5.45160007476807
2018	5.40716981887817
2019	5.35443019866943
2020	5.67784023284912
2021	5.23999977111816