Year	% of GDP
1968	18.49939262676969
1969	18.893678889168662
1970	18.633789776501374
1971	18.6039717158004
1972	18.586799575166157
1973	17.554463134557917
1974	12.624278492057456
1975	16.211464337300665
1976	16.995404274674577
1977	16.85038662827333
1978	19.71324614624428
1979	17.854446899691634
1980	15.453487125674028
1981	18.80060758073017
1982	22.58014526194401
1983	24.589010841922306
1984	23.75647680312778
1985	23.544807732099375
1986	25.9181649517495
1987	24.988846842219335
1988	24.208966502353597
1989	23.605035669605147
1990	17.760283476973385
1991	22.802829243362837
1992	22.63326010267357
1993	20.06593317082809
1994	18.871971280469708
1995	17.93657898356514
1996	17.938032246251563
1997	18.510701110122056
1998	19.330608118842203
1999	17.629570348324183
2000	17.026373938230336
2001	17.9368128657171
2002	17.995541743684335
2003	17.092453833354778
2004	16.733726569580007
2005	15.480991302552141
2006	14.84913854591024
2007	14.559095992716642
2008	13.418517090646104
2009	16.612816884794658
2010	15.591490968840446
2011	16.001255036674774
2012	15.926619935318708
2013	17.118880673881225
2014	18.473091018196676
2015	20.300160834126
2016	19.134081570269178
2017	18.505374022212635
2018	17.973157250734715
2019	18.436655045995
2020	20.760347736987338
2021	17.518559890956467
2022	15.775493235632993
2023	17.397812459832657