Year	% of GDP
1970	2.30026006698608
1971	2.85506010055542
1972	2.74079990386963
1973	2.81235003471375
1975	3.42302989959717
1976	3.61462998390198
1977	3.69379997253418
1978	4.33933019638062
1979	4.40278005599976
1980	4.55202007293701
1981	4.68798017501831
1982	5.2756199836731
1983	3.31966996192932
1986	3.78981995582581
1987	4.08302021026611
1988	4.014319896698
1989	3.87238001823425
1995	3.65909004211426
1996	3.47681999206543
2001	3.53973007202148
2005	4.86388111114502
2006	4.43285608291626
2007	4.26999998092651
2008	4.32999992370605
2009	4.86999988555908
2010	5.01000022888184
2011	4.98999977111816
2012	3.87815999984741
2013	4.67999982833862
2014	3.85569000244141
2015	3.76792001724243
2016	4.34999990463257
2017	3.48645997047424
2018	3.66211009025574
2019	3.73954010009766
2020	3.83822989463806
2021	4.69999980926514
2022	4.70302200317383