Year	% of GDP
1960	16.35883364331723
1961	16.080715010673877
1962	15.252945263597413
1963	16.208448083992252
1964	15.735846111247241
1965	16.114741092809982
1966	15.97390465485339
1967	17.285309350997572
1968	17.700998078401643
1969	18.742376088211813
1970	17.46430715740743
1971	18.810991695821464
1972	20.333322980586995
1973	21.274896203118054
1974	20.163932545999955
1975	24.437348307688858
1976	25.429385628654458
1977	29.12278707549057
1978	30.508658348430984
1979	29.059506906728835
1980	30.217781683994023
1981	22.100395782665768
1982	23.789215245347048
1983	29.17788673167672
1984	30.09048370441341
1985	31.620781027126952
1986	32.93720590202107
1991	30.379551803322514
1992	36.86234951029622
1993	33.92183122512925
1994	32.662808190113545
1995	28.67427679569325
1996	26.61293419789134
1997	26.894484612015418
1998	26.75312756569946
1999	35.90894425114409
2000	34.67498845064441
2001	33.100591532464875
2002	34.59823715706771
2003	35.33180878175751
2004	32.112884184357384
2005	30.762691982156987
2006	31.355527058757396
2007	34.98454272299089
2008	35.488438525490565
2009	40.76986919951603
2010	38.067387286121885
2011	39.09149498951023
2012	40.46100602242336
2013	43.138589297995985
2014	39.946349500412765
2015	42.528125739932065
2016	48.475505099146005
2017	48.08169207918466
2018	35.481646116597126
2019	36.7365714186816
2020	44.9093601349337
2021	35.02465159390483