Year	% of GDP
1967	69.29049614550226
1968	67.18180911661746
1969	66.51922695794863
1970	66.27663583753612
1971	66.6118870042798
1972	65.68900463189263
1973	62.90173365416477
1974	57.2906158644237
1975	58.521136433938295
1976	56.1771765857103
1977	57.517392160197076
1978	59.94703319234802
1979	58.0814300450485
1980	57.22195640694324
1981	58.821022230262244
1982	60.87981554991847
1983	62.6649175347162
1984	63.008461615945656
1985	64.59838281642483
1986	66.35543026614113
1987	65.61818969489399
1988	66.22318392435166
1989	65.121089966186
1990	65.76976802969672
1991	66.85535430992327
1992	67.60728714820058
1993	67.19039845285234
1994	66.69664660259379
1995	65.58325749980455
1996	64.92502481102187
1997	65.10796167137728
1998	65.9063961348448
1999	65.66580128769998
2000	64.23020554461775
2001	64.70654391115912
2002	64.20081595976666
2003	63.36268632917034
2004	61.77396355419623
2005	60.59625519995904
2006	59.216061862273904
2007	59.421661041591555
2008	58.961481270551715
2009	60.21370855269391
2010	58.92554942683269
2011	58.4515417269908
2012	59.242506060326875
2013	60.336254794288415
2014	61.25875786173386
2015	62.165773675684
2016	62.034648333869704
2017	61.283654288419385
2018	60.786993449147985
2019	61.596362439446004
2020	62.07914308497193
2021	61.44319790883031
2022	61.093003324062344
2023	61.803900718911386