Year	% of GDP
1970	22.411764705882355
1971	21.83951079495819
1972	26.527958387516254
1973	18.91288915931447
1974	21.659829599242663
1975	19.012477545273583
1976	20.687563195146613
1977	19.871913523118497
1978	22.025996480286516
1979	18.40970903679376
1980	20.8738053442559
1981	19.158672484303025
1982	19.910449497005292
1983	21.03805378559441
1984	19.331846778689176
1985	20.63322319014719
1986	23.459718011067416
1987	25.339827110999753
1988	30.551419802523018
1989	23.649062673534647
1990	28.2851584627769
1991	30.67588039696499
1992	31.71245593735705
1993	29.008471196722695
1994	27.841083103965413
1995	28.201585008100178
1996	27.71731342376208
1997	25.77387203598862
1998	29.386395494177957
1999	24.345861026600186
2000	24.733949943788737
2001	25.297944164729653
2002	25.005041715895125
2003	24.65547593800941
2004	22.43326379301771
2005	20.293102006189436
2006	21.45679690269485
2007	19.45880867244183
2008	18.756403029337516
2009	22.79501171299299
2010	19.438973200725204
2011	20.646904744337046
2012	23.43229828202597
2013	25.104930372641736
2014	26.860125618412102
2015	33.13046221293691
2016	34.166872822714716
2017	40.635607528815704
2018	39.00988118962555
2019	40.74104479159594
2020	36.641863266624
2021	27.82214694523863