Year	% of GDP
1967	61.04450322380449
1968	58.045800955119965
1969	54.232414426131314
1970	51.24075479793798
1971	51.31276917338232
1972	51.35477324395392
1973	50.79692684194151
1974	51.25989020878815
1975	52.88955845722868
1976	53.15548939358611
1977	52.82076898127165
1978	52.51585618842209
1979	52.82282119112247
1980	53.131388521497335
1981	53.44307342682163
1982	54.436597757521795
1983	54.23140871277424
1984	53.30416096973381
1985	52.94105098099542
1986	52.28394963211236
1987	51.80743529313462
1988	51.322936539581995
1989	51.69613670154578
1990	51.81170778661961
1991	51.398431774749454
1992	51.80816142205485
1993	52.222584235523904
1994	52.88328376178095
1995	52.936922617844985
1996	52.936907178646884
1997	52.8402536092004
1998	52.6337844814741
1999	53.757253433756205
2000	53.38749962739844
2001	53.75642851617452
2002	53.96039633992816
2003	53.25093038561586
2004	52.33957949428157
2005	51.8128993521826
2006	50.855233556010084
2007	49.59629427958281
2008	49.027380277144935
2009	49.02627828411363
2010	47.81330076878688
2011	47.559260707826674
2012	47.52206495835309
2013	46.87637180502606
2014	46.54641451736632
2015	46.20508214103723
2016	46.60940957618557
2017	46.13141729416197
2018	45.89212030203219
2019	46.30515376960489
2020	45.21163738874375
2021	44.156720913913894
2022	43.79544529095011