Year	% of GDP
1972	19.279800727958435
1973	19.86392148626998
1974	20.649172830778454
1975	22.620442542836333
1976	22.987000353529684
1977	23.042682342018743
1978	23.331959666643503
1979	23.4743397548361
1980	24.687246511551855
1981	24.959732528454246
1982	25.954528280368912
1983	26.207389107458123
1984	25.61477920902087
1985	25.924672847012257
1986	26.672210922801447
1987	26.170767267108182
1988	25.321100185085488
1989	24.955452875938274
1990	25.222248507298026
1991	28.699955459435103
1992	28.592255567080162
1993	28.66905184579944
1994	26.784874707153733
1995	27.393094748611595
1996	26.972064401160083
1997	25.91663963028657
1998	25.895544321041573
1999	25.10499796828121
2000	24.914616830559087
2001	25.685890272275852
2002	26.067896630610285
2003	26.413015396658228
2004	25.917023122234113
2005	25.964802791744397
2006	25.684088005690334
2007	25.577293915539098
2008	26.78321439211575
2009	29.809111006957735
2010	29.683147847310064
2011	28.644261895376516
2012	28.684663024421663
2013	28.09386717378995
2014	27.83899089090116
2015	27.704002720323324
2016	27.49410082990576
2017	27.172668846989986
2018	27.047991844632943
2019	27.2860840808691
2020	34.69288547593631
2021	33.12132778509313
2022	29.875952711745395