Year	% of GDP
1970	27.912139549666893
1971	29.225144122780318
1972	29.68245746067506
1973	30.649599101486164
1974	31.784687957370323
1975	33.476635112197
1976	29.908426972724623
1977	29.19417830758777
1978	25.890543545524103
1979	25.216132862470015
1980	27.319725465727785
1981	27.123230094307406
1982	27.416302595612457
1983	27.7936002680516
1984	26.322484100261878
1985	26.65293158211005
1986	26.133699137064742
1987	26.918305865674284
1988	28.174080784119493
1989	30.557334295793503
1990	29.679306060972525
1991	25.87486622400718
1992	22.226415984525016
1993	19.149904326317262
1994	18.652547135505625
1995	19.27873443667617
1996	20.502924091180706
1997	21.36146633335439
1998	22.209771402958314
1999	22.443978694569637
2000	23.05741633807772
2001	22.875238543020714
2002	21.602036555634875
2003	21.783339593671126
2004	22.25777598609204
2005	22.91802024446374
2006	22.763842056253143
2007	24.195496920971603
2008	24.493861477878156
2009	22.954986877362487
2010	22.29633842343324
2011	22.616390064546106
2012	23.077841392380506
2013	22.008016797098684
2014	21.47203681058691
2015	21.229983205998533
2016	22.74478433968683
2017	23.34899094568738
2018	24.075010065877958
2019	23.82618049012332
2020	24.042799889093338
2021	23.61567676251875
2022	24.147231654880514
2023	23.35380459252589