Year	% of GDP
1972	24.79225769447433
1973	25.756726698230217
1974	26.164880749931882
1975	26.483517346462826
1976	27.40170962931442
1977	27.92666599475173
1978	28.278344728680445
1979	28.572492043904354
1980	29.77294215667952
1981	29.992796971818404
1982	30.913571363391366
1983	31.47262294261359
1984	31.390043445075758
1985	31.59139915733355
1986	31.986419169790622
1987	32.09113493838797
1988	31.769111645017652
1989	31.852743411488483
1990	30.99525759593153
1991	33.15696755686629
1992	33.63168013343141
1993	33.63075124679212
1994	33.70055462829722
1995	37.260336988973194
1996	37.56048595507059
1997	37.81559757871898
1998	36.95075541751409
1999	37.31765732341249
2000	36.71134944956156
2001	36.29450712090914
2002	35.86539334083992
2003	35.79908193275788
2004	35.30449443096219
2005	35.39719210430856
2006	35.700601142217586
2007	35.594803065932915
2008	35.77939490311066
2009	35.83510008111506
2010	35.92127665362795
2011	36.12057898247909
2012	35.722595826569666
2013	36.401217358946624
2014	36.36773042331393
2015	35.99621625535604
2016	35.85468470653911
2017	35.86755436985704
2018	36.00549004407623
2019	35.917672622145915
2020	35.983334279842566
2021	36.18895499315255
2022	36.23708790968162