Year	% of GDP
1972	15.996923653199696
1973	16.19310363224974
1974	16.397121119343876
1975	17.289042065032547
1976	17.59078681229369
1977	19.18249734056485
1978	20.95135380836712
1979	22.526907846379043
1980	23.090907904161952
1981	23.4614437175484
1982	26.27673104725862
1983	26.92768944851267
1984	27.61566051372753
1985	29.62206949125019
1986	29.524001892946234
1987	29.565964299547414
1988	29.10077261972229
1989	29.40074905299561
1990	29.33258193461292
1991	30.155297365713373
1992	31.710992416757378
1993	34.63085467708649
1994	33.76510936327388
2012	38.4999961206629
2013	35.758717008416966
2014	34.789484489757974
2015	33.19503344798032
2016	32.681125607939556
2017	31.839272872415464
2018	32.25768133975823
2019	32.32627840897686
2020	41.05459289908044
2021	39.02519042125846
2022	36.2852306597632