Year	% of GDP
1975	42.407548355139966
1976	39.9706250915423
1977	38.021041416966305
1978	35.70262270255387
1979	36.23179701244523
1980	33.402604066448596
1981	33.81828923804073
1982	32.73577043125847
1983	31.08394144377507
1984	32.508776003606016
1985	31.861206074559874
1986	32.934395859675945
1987	32.751185301405215
1988	31.645316092644666
1989	30.43673179661523
1990	29.91315338824105
1991	30.65479663034093
1992	32.78560674169474
1993	34.110189388010646
1994	21.53734551046523
1995	20.704224821532843
1996	20.309445307608723
1997	20.213465016600914
1998	21.261260378412413
1999	22.384069623244116
2000	19.636923003612605
2001	18.287439619659214
2002	18.106229525314873
2003	19.16298150678823
2004	20.24977906441994
2005	17.76223621877798
2006	15.771896506878027
2007	16.708018732293368
2008	14.743697741480355
2009	15.51452705995391
2010	16.44001951956599
2011	17.049495008415978
2012	16.644270031597618
2013	17.10784193893995
2014	16.355336553634984
2015	16.86860269625935
2016	16.617615095338262
2017	16.80540050336647
2018	17.07230205229377
2019	19.63512082410706
2020	17.811566924296756
2021	16.323248464254505