Year	% of GDP
1968	14.777414934105837
1969	14.68651584325322
1970	12.682866352591123
1971	10.903620063901728
1972	12.212901937287796
1973	13.979135080499603
1974	8.834110758237395
1975	17.39318057497113
1976	21.403027352394442
1977	25.530263344052678
1978	29.990728219561625
1979	24.9190026014928
1980	20.72377375173782
1981	21.217356709610872
1982	24.89216384243167
1983	26.941795432545803
1984	25.15668069399703
1985	22.287799148592413
1986	22.574684802186198
1987	22.328787184784268
1988	18.92659726067185
1989	18.59381345133239
1990	18.898132909596505
1991	20.291775045640335
1992	20.248581011854444
1993	21.85374474109626
1994	18.3714912194062
1995	19.24592973436161
1996	17.308912454076214
1997	17.57602962991566
1998	20.522775831746632
1999	19.49017131154164
2000	17.352933313258692
2001	18.260981642713563
2002	18.011538320895838
2003	18.29999295669355
2004	19.15647290532762
2005	19.312365988473893
2006	20.45213182372399
2007	23.651566209720514
2008	22.803731509441125
2009	25.756486321379985
2010	24.430867280870082
2011	22.417927153205277
2012	22.11318947912911
2013	23.467169344660334
2014	24.927229011552914
2015	29.35600976034886
2016	25.60772772772773
2017	23.947852291672106
2018	20.720990308027023
2019	22.386025902033253
2020	24.098126141948644
2021	24.297844625749484
2022	24.638652074273125
2023	27.89426382737229