Year	% of GDP
1968	29.27652160890547
1969	28.852645948741245
1970	30.452334427523947
1971	28.61675649070709
1972	29.854516336042213
1973	23.816946899052198
1974	30.817100002472518
1975	31.83076065224762
1976	37.504754989378775
1977	38.5314161871109
1978	37.569888952890345
1979	27.868094372288567
1980	30.666313450152504
1981	29.425003850812953
1982	29.339581359240803
1983	31.211860808479386
1984	29.96765015603971
1985	24.81517500306774
1986	24.137141274118576
1987	21.511320054425457
1988	21.499964784844057
1989	19.690675136650743
1990	30.612530703043628
1991	24.00284367655117
1992	24.17342906713413
1993	24.62434895835344
1994	22.654572695766202
1995	24.60225011192982
1996	25.298972724038016
1997	22.929850312481538
1998	24.71214632603871
1999	24.0566272811627
2000	22.29598154294218
2001	23.799765730367533
2002	23.725590634133166
2003	24.74555857534143
2004	25.210354571192855
2005	24.124006525795664
2006	25.018202949981976
2007	27.77009589048682
2008	28.580864423805647
2009	29.919625444237223
2010	28.41093916776336
2011	26.431977416763463
2012	25.94786106369473
2013	25.756736381547245
2014	26.924104252872837
2015	28.4197051586748
2016	28.18949072064616
2017	28.010298219377965
2018	26.971358501222053
2019	27.27337259211445
2020	26.83916965594853
2021	26.100213385043375
2022	25.69373561190077
2023	26.08880058431094