Year	% of GDP
1970	28.358709532717995
1971	26.071497124274185
1972	27.312119344817365
1973	28.698005436687772
1974	31.84526755277362
1975	30.108095389774064
1976	28.41782332434919
1977	26.36509427775737
1978	24.171353959584206
1979	23.5635554029656
1980	24.37211378624425
1981	22.706855924410096
1982	22.58306208604971
1983	21.728426946371485
1984	20.59604873613045
1985	20.81940491501585
1986	21.728420598521538
1987	23.160435676339613
1988	25.348556137497418
1989	26.675761583258556
1990	26.836142073774578
1991	26.0169781914161
1992	24.06589902872012
1993	21.463476836713394
1994	21.651435536391897
1995	22.5188237644055
1996	22.226560344069846
1997	22.61106018472157
1998	23.927099801616208
1999	25.537707961586175
2000	26.64038490331882
2001	26.45903739409666
2002	26.684206032403356
2003	27.50347141721075
2004	28.285377520399983
2005	29.387172361884367
2006	30.565348672026843
2007	30.442224782178982
2008	28.454559137517226
2009	23.3033423951416
2010	22.303066348842044
2011	20.571875502344035
2012	18.435579728136055
2013	17.210145814983584
2014	17.894205739254392
2015	18.987433354481805
2016	18.743561673336803
2017	19.400735660976594
2018	20.467762420682156
2019	20.82940924743459
2020	20.4695221669154
2021	21.589884560947077
2022	21.481353291091573
2023	20.310365561270384