Year	% of GDP
1970	12.64634709560834
1971	12.68997797210954
1972	12.999833010322224
1973	14.552469329175041
1974	18.106863113973773
1975	16.565897064046027
1976	17.382871440952602
1977	17.48489635785278
1978	16.88045356689036
1979	18.771111811596754
1980	20.250898738758913
1981	19.448787049100467
1982	18.620241723520955
1983	17.7545756065941
1984	18.26267247246972
1985	17.78947828130484
1986	16.6950575257461
1987	17.145233237967012
1988	17.44115012135417
1989	18.141234853395797
1990	18.62047528787787
1991	17.89701749517738
1992	17.740435906874538
1993	16.990471895889435
1994	17.822838033086345
1995	19.04124246579483
1996	19.728839826817776
1997	20.521862286990935
1998	20.53793884536469
1999	20.63552048116741
2000	22.410328677490433
2001	21.865516228176507
2002	21.63792622670096
2003	22.265054628708196
2004	23.837255763628065
2005	25.284864722668367
2006	27.10818791341888
2007	28.091009694175884
2008	29.67966368667327
2009	24.801073127908516
2010	27.500526087107136
2011	29.930959596495
2012	29.665193897682542
2013	29.849143601177342
2014	29.860142824740105
2015	28.29064213787089
2016	27.250461755146045
2017	28.489319994990147
2018	29.42276765489895
2019	28.5582347821507
2020	26.206260377867725
2021	28.83871372791854
2022	32.18615081329296
2023	29.91779237171508