Year	% of GDP
1977	15.703827791244805
1978	15.380334278035523
1979	15.985550897270823
1980	15.610468750569124
1981	18.391207474817925
1982	18.27112041039355
1983	18.731218197996327
1984	17.98617138478873
1985	17.642033514642407
1986	17.1708716555771
1987	18.678214268167668
1988	19.328767049334196
1989	20.374096165118406
1990	21.858070042276086
1991	22.28024102148588
1992	23.013573697483405
1993	23.071012626709205
1994	24.02796794639839
1995	24.181865384843615
1996	23.72189086084389
1997	24.065677026766878
1998	24.111498039720143
1999	24.63921184319101
2000	24.762992337215728
2001	25.16247267594078
2002	26.178033372919604
2003	27.315619835191566
2004	29.55481987361303
2005	30.107988154397127
2006	31.601052960453174
2007	31.71000511391812
2008	31.23699876178052
2009	29.790527822019964
2010	30.960643156269622
2011	29.999117512118932
2012	29.445828582491075
2013	28.933929350595058
2014	28.48496819812126
2015	27.43715643351109
2016	27.105203031461762
2017	27.43437604702417
2018	27.66408170971784
2019	26.977966057866357
2020	25.872835990109685
2021	26.07989340056698
2022	25.884627793650537