Year	% of GDP
1970	21.47099270487457
1971	22.014801790962014
1972	22.627398504865603
1973	23.418351513805042
1974	22.994707703325435
1975	20.706825815292387
1976	22.3469651206371
1977	23.598563463186718
1978	24.71983044347402
1979	25.1160051422602
1980	23.351720680488704
1981	24.367454594431067
1982	21.886740547775087
1983	22.079352451013804
1984	24.761278047117
1985	23.98294166913678
1986	23.583963390045675
1987	23.502703494683633
1988	22.888507411551355
1989	22.614612703924276
1990	21.50937929342749
1991	20.04160473357419
1992	19.936245684462154
1993	20.244789756631082
1994	21.149851516034
1995	21.134115629769042
1996	21.499999530944187
1997	22.32413640436096
1998	22.832078544748818
1999	23.237977569767292
2000	23.46977861401937
2001	22.01200061500903
2002	21.59219211202362
2003	21.651437628649944
2004	22.552229927219482
2005	23.312673862531014
2006	23.53944836638354
2007	22.678505694096714
2008	21.322913297549594
2009	18.129449597932183
2010	19.1365427251523
2011	19.558693707151704
2012	20.44455573814175
2013	20.82235859666404
2014	21.267380635213126
2015	21.600615409773607
2016	21.025932015757444
2017	21.338983546704686
2018	21.70578459066772
2019	21.786451368608272
2020	21.496517383909968
2021	21.602270175282463
2022	22.14915603116605