Year	% of GDP
1960	8.403594136028559
1961	7.3743760912395375
1962	7.144106330884914
1963	8.908774152676592
1964	10.114687869654981
1965	10.485196821781345
1966	10.563025814338104
1967	9.638802889576883
1968	13.461657870226636
1969	11.781503543284572
1970	13.618697478991596
1971	12.97359935509875
1972	12.497025650787617
1973	14.362450787698474
1974	15.340816553560543
1975	14.284536054197867
1976	15.394134863851974
1977	18.237388258830826
1978	15.832045734126915
1979	14.242464745386819
1980	13.132878520568115
1981	10.519897396924865
1982	10.244344737100313
1983	9.51381394414082
1984	9.423440238400842
1985	10.461630340715304
1986	11.792528022524763
1987	7.465412624141214
1988	7.866626659526697
1989	8.34846742903378
1990	9.788171708836078
1991	10.6802363534567
1992	9.095045359331614
1993	8.8734215172789
1994	8.350298386277796
1995	8.883769946303573
1996	7.914060918894035
1997	8.044804695193482
1998	9.314995370115563
1999	9.003334171797919
2000	9.07986818190521
2001	5.018181420954975
2002	5.610749978772228
2003	4.400567489596386
2004	4.167945718360367
2005	2.259867797821545
2006	2.2958650901850537
2007	2.5049486302941415
2008	0.09864254566666288
2009	2.3247974970725194
2010	1.8634927710503502
2011	2.909414598881971
2012	2.166901252273705
2013	3.153716897732534
2014	3.4766089231318595
2015	4.594517328823612
2016	4.9954095275433374
2017	4.516778751381458
2018	3.117394542414348
2019	4.037046274340843
2020	5.053443505560832
2021	2.7957573807174034
2022	0.020775578522109768
2023	0.6237546225005737