Year	% of GDP
1967	53.09278350515464
1968	27.19186785260483
1969	22.900000000000002
1970	19.382022471910112
1971	17.106314948041568
1972	24.928977272727273
1973	23.96694214876033
1974	8.724714160070361
1975	15.89340180798147
1976	20.536017188736857
1977	26.003377059212397
1978	32.84732880641006
1979	26.1341527723924
1980	27.699530516431924
1981	25.808645722145506
1982	31.90388472814115
1983	31.369759165289214
1984	30.80180183136959
1985	32.57038781707769
1986	36.45851819499881
1987	30.951589230591637
1988	36.58551713443945
1989	35.653235653235654
1990	45.73042133143404
1991	51.535752614199225
1992	50.07125670962217
1993	52.08255058705971
1994	51.12407746663177
1995	51.45857247837802
1996	48.58089474490578
1997	47.67222267838082
1998	47.272753049775766
1999	43.549102046557195
2000	35.363644490242166
2001	37.26410976051724
2002	36.159169574745526
2003	37.59385608414783
2004	37.17000196478601
2005	30.565982043148125
2006	29.711067581111145
2007	30.62390403299543
2008	28.061430480845274
2009	36.44849100143143
2010	29.353370948379354
2011	30.327406721301575
2012	29.273670210391955
2013	29.22898520549213
2014	29.161289236535847
2015	36.06361290365216
2016	38.01329317686156
2017	39.15064298442556
2018	34.80331969076853
2019	37.5186801892532
2020	44.077196963922844
2021	44.31402609261631