Year	% of GDP
1970	26.89113081928055
1971	24.58969066783507
1972	25.74784444604378
1973	27.274351712637984
1974	28.863251120878115
1975	27.263210053032623
1976	25.712671262637443
1977	24.683116205017292
1978	23.372764266137054
1979	22.258059966411857
1980	22.765226977229656
1981	22.644168709478556
1982	22.41541287842105
1983	21.80286102485858
1984	19.982374084642405
1985	20.520472052636855
1986	21.065457930945197
1987	22.29820498098943
1988	24.119482967874873
1989	25.50276356481973
1990	25.753067974313865
1991	25.018451045687247
1992	23.03059330670267
1993	21.17267784994159
1994	21.02187838518762
1995	21.896792795296445
1996	21.6869070712976
1997	22.131346433826078
1998	23.276731901300916
1999	24.73162862605607
2000	25.940841335430527
2001	25.877291214034948
2002	26.15575703887122
2003	27.098618164050325
2004	27.807622897315337
2005	29.011588848738946
2006	30.027305610650483
2007	29.862236515830666
2008	27.83646570969437
2009	23.113222104078936
2010	21.788947421901
2011	20.02175296565118
2012	18.52752001737943
2013	17.36494503158198
2014	17.771990920078093
2015	18.00606998289571
2016	17.95086233197538
2017	18.660945623711818
2018	19.43715999963451
2019	20.032067108091205
2020	20.422695060812682
2021	20.102348869744496
2022	20.076843261582752
2023	19.28443267580507