Year	% of GDP
1967	4.381443298969072
1968	4.8284625158831
1969	5.1
1970	12.827715355805244
1971	20.783373301358914
1972	29.61647727272727
1973	37.1900826446281
1974	34.68777484608619
1975	31.621103510232462
1976	27.24188623770214
1977	28.358678880578907
1978	28.76914645862161
1979	27.506785575804578
1980	25.0084652243357
1981	24.596174187525456
1982	26.10561331702256
1983	26.56301786791554
1984	26.518756769175226
1985	27.144889237098564
1986	33.20584289931576
1987	30.42218254052682
1988	29.648007443014425
1989	27.07292984792985
1990	22.290233479489864
1991	25.11990689781691
1992	24.406071555379185
1993	25.38643101007578
1994	24.919245867976567
1995	25.082287878502385
1996	23.679629913351377
1997	23.236718942441907
1998	26.489794695048623
1999	24.13316519238114
2000	21.482728984041376
2001	23.1575915278209
2002	23.65237945222125
2003	22.246134025204224
2004	22.420801416763204
2005	20.79022622476474
2006	18.629218293821463
2007	18.81045531294844
2008	14.161723260207634
2009	19.35521118367086
2010	16.37458343337335
2011	15.81828188658223
2012	17.14466789849057
2013	18.897120912424377
2014	21.61558575645011
2015	24.63827017310825
2016	26.124900474261782
2017	24.528617470906482
2018	21.558663028649384
2019	23.108501627317672
2020	26.065889294332727
2021	22.140303724980768