Year	% of GDP
1970	7.16190012707325
1971	6.99097752673545
1972	9.01389998420143
1973	10.8416352012321
1974	27.7199227930192
1975	22.633272567122
1976	23.7199737259153
1977	23.1641392496026
1978	20.1203326203857
1979	36.9394487987451
1980	30.4169667655539
1981	24.5140416578688
1982	18.3348339984003
1983	16.5357512739164
1984	15.4490512271312
1985	14.2827795193099
1986	5.87028540433224
1987	8.53318724872721
1988	8.0022301703217
1989	12.5689148306239
1990	15.7969733351133
1991	13.5417656312112
1992	13.0452267711099
1993	11.7164360598656
1994	12.6865225216351
1995	14.1774813179102
1996	16.3135923983909
1997	14.7901349570278
1998	9.01756331973938
1999	12.955667382787
2000	20.2038945100895
2001	16.7197713612172
2002	17.703706765696
2003	19.6786326659537
2004	22.1269733272223
2005	27.9141141505655
2006	29.5343935472454
2007	27.9267087662485
2008	29.1086401323721
2009	19.9046263657492
2010	21.9939993236664
2011	25.0260096148481
2012	22.6025382987382
2013	20.8724313901278
2014	19.3167294732848
2015	11.7459031918092
2016	10.0262189142963
2017	12.1565741270026
2018	15.9428081774505
2019	14.1421031504305
2020	9.03841379679424
2021	14.4615654623053