Year	% of GDP
1975	22.78238878217132
1976	19.785343466727422
1977	19.174389107055273
1978	24.680663591932266
1979	28.119752446876934
1980	29.03812028306929
1981	28.307146945331684
1982	29.3154445769941
1983	26.89649047499223
1984	23.541544303451666
1985	23.261006069908603
1986	22.51007145587673
1987	22.473143170691976
1988	20.833834050360114
1989	20.20622408189188
1990	18.010818451167466
1991	15.355984411826476
1992	15.832259182634504
1993	15.811029373402203
1994	21.123505443341823
1995	25.669962893899157
1996	25.49113560134164
1997	19.266592721220636
1998	20.066861422492163
1999	19.861178507883043
2000	19.985764022289132
2001	24.220545973971603
2002	24.662621869166337
2003	20.850332812951823
2004	20.54476250219876
2005	22.143029857778902
2006	20.946842181557038
2007	21.532452408603792
2008	20.7819304986987
2009	24.626480467763734
2010	29.809819901901886
2011	28.239407475136886
2012	35.01947134749446
2013	22.258957497761177
2014	21.161014580670866
2015	22.55334413319346
2016	23.735513326918937
2017	25.83258726494424
2018	21.87279731780905
2019	24.37688250422919
2020	23.230727745474805
2021	23.2353662119151