Year	% of GDP
1968	50.64910560863527
1969	47.69889173780516
1970	51.6323663112654
1971	60.030399851102764
1972	63.473636908328345
1973	65.3815608981301
1974	80.6638298928146
1975	68.9989667537835
1976	66.24457820660352
1977	55.45787909957518
1978	44.00687504351873
1979	46.894434720618825
1980	59.06489264333252
1981	53.88446934149545
1982	37.46683062584946
1983	25.142508873193993
1984	22.128153184140736
1985	14.881828666181264
1986	10.376063598534252
1987	11.447320452059788
1988	15.809076028912106
1989	15.113494741853724
1990	24.64559332614494
1991	21.903121314441734
1992	26.08522888853395
1993	25.953631279306776
1994	28.287734824091814
1995	29.92008494467419
1996	31.963122968877013
1997	31.906701805532762
1998	26.12571038211654
1999	33.00051612775564
2000	37.9610542564104
2001	35.32995614873515
2002	36.998151955916974
2003	41.369663614155314
2004	46.752442328681425
2005	52.32224353677491
2006	51.93437294322103
2007	51.48448160058814
2008	55.41616775375814
2009	41.034182101115086
2010	47.516050519568836
2011	53.88428221236078
2012	51.87799004794142
2013	47.814638315212775
2014	41.9527183373151
2015	29.847452725799677
2016	31.31047047047047
2017	34.11333604353226
2018	38.56450190869089
2019	36.27575750059307
2020	27.781960307490383
2021	33.85458278232566
2022	43.35629060631304
2023	36.713513092253756