Year	% of GDP
1972	17.943917650464133
1973	18.16159143228871
1974	18.043783429339946
1975	19.08457685240271
1976	18.854568871942245
1977	20.628788854220296
1978	21.534463818228662
1979	22.034687134375762
1980	21.973364288195544
1981	21.86302572008375
1982	22.948834283541288
1983	23.75336827289547
1984	23.539056124879362
1985	24.908196000373042
1986	26.455824089530704
1987	27.707356578506637
1988	27.469926187275917
1989	28.84067271625363
1990	27.95043753429291
1991	28.50770107893885
1992	29.1560115654311
1993	29.066076790373387
1994	28.404406854124165
2012	26.01580441934082
2013	28.068233143296066
2014	28.48564024295764
2015	27.770171747865675
2016	27.336910679994975
2017	27.217477625652474
2018	27.94812349286752
2019	28.033910525221334
2020	29.506259997676516
2021	30.46715591226305
2022	30.41035311803455