Year	% of GDP
1960	17.56837698336838
1961	17.593949216639654
1962	17.91202398593928
1963	17.214759825327512
1964	16.81183082717917
1965	17.608771929824563
1966	17.959492985351762
1967	18.77411865234375
1968	18.20754565701559
1969	17.67937230819956
1970	17.721659840957926
1971	18.063544199802823
1972	18.420325036000822
1973	18.236829783444026
1974	20.124815440617805
1975	22.39987371195344
1976	22.142158362302048
1977	20.75195138446849
1978	20.24131123582035
1979	19.835977095222702
1980	21.273898896325335
1981	21.714791980229293
1982	21.58463777161193
1983	21.35907226293417
1984	21.06141762695059
1985	20.275772916005465
1986	20.24829288027862
1987	19.541957606395226
1988	18.763316857902833
1989	18.34070399214845
1990	18.54276377232719
1991	19.397685526709736
1992	19.875590401237783
1993	19.185011317811494
1994	18.833032517619525
1995	17.041597943287805
1996	16.601226602842
1997	16.04271007599079
1998	16.039743575619855
1999	16.45303897059951
2000	16.64089640536651
2001	17.263498627997574
2002	18.138738114162788
2003	18.838162204947174
2004	19.40003190595757
2005	19.597440284139616
2006	19.7937824974627
2007	19.682682727398088
2008	20.379957329317268
2009	21.989318195611833
2010	21.529660508544016
2011	20.896252232961825
2012	20.737637238397284
2013	20.129103533758737
2014	19.866213086183514
2015	19.54853006938346
2016	19.218284383010023
2017	18.659320944910927
2018	18.541293423233892
2019	19.09610948641425
2020	22.602324396660535
2021	22.27225940959135
2022	20.997445710881287
2023	20.730831434816942