Year	% of GDP
1970	23.400814764539945
1971	23.01969365426696
1972	24.94918699186992
1973	24.87773068144767
1974	27.833827893175073
1975	30.198454513523004
1976	26.904898309939846
1977	24.400690404653837
1978	23.558939650310208
1979	21.38577502899111
1980	21.664037200033214
1981	24.703355155482814
1982	25.73090602206281
1983	25.83741112222553
1984	26.35874117506282
1985	27.349789632945757
1986	24.093662105499284
1987	23.26454896670142
1988	21.25269116158376
1989	21.6339675524174
1990	20.67334848345528
1991	17.66029986704753
1992	17.869407033892895
1993	19.531776529707358
1994	21.294701986754966
1995	22.42508001163806
1996	22.344981750922344
1997	22.149501502647524
1998	20.558665493419205
1999	21.875137994683342
2000	20.850474386468512
2001	21.486730064018893
2002	21.937254495824117
2003	23.25711754854604
2004	24.217936192651347
2005	24.745760631409684
2006	23.913397362852027
2007	23.912938668152332
2008	22.70044243582569
2009	20.173231021013137
2010	19.750961434430664
2011	19.964793691029435
2012	20.756894443065097
2013	21.344347220969343
2014	22.472280479111987
2015	22.859704695043405
2016	22.540785754559494
2017	22.90350985814725
2018	23.457979638962286
2019	23.436663313472103
2020	23.055440376594554
2021	24.678055337114685
2022	25.365674403305714