Year	% of GDP
1975	20.561156730218087
1976	20.456565309281064
1977	21.887982375048644
1978	23.730058967870185
1979	22.003213630475123
1980	22.09462117691142
1981	20.85236791804281
1982	22.303579650492427
1983	21.991578145991156
1984	22.439519881284113
1985	23.009720208624888
1986	24.39762944438703
1987	27.30851645767937
1988	32.00994993830886
1989	34.04926396133852
1990	32.82681871088618
1991	34.52801616983205
1992	34.019905421832405
1993	35.940378563962774
1994	35.8027071005383
1995	35.80281170538413
1996	34.60352018090332
1997	32.25459750911729
1998	31.743744505645743
1999	30.455237567540593
2000	30.7820937245273
2001	28.225509577268546
2002	28.103890614555034
2003	27.97383964184517
2004	27.899484106246845
2005	28.24095242330234
2006	30.445148312901132
2007	32.24983409155756
2008	30.662055726250596
2009	29.27406079654387
2010	29.627590679385317
2011	31.43396296649773
2012	28.931311396431465
2013	27.22076714621889
2014	27.48507895470566
2015	28.043823657924015
2016	30.07650444786941
2017	31.94246723177895
2018	31.686584944472873
2019	31.700751202550098
2020	28.15091410355025
2021	27.53208184955894
2022	26.66436160058948
2023	25.25666179642697