Year	% of GDP
1970	30.713091553381876
1971	30.436843933312158
1972	31.220772291651482
1973	31.234617707186267
1974	30.768555857814693
1975	26.582477330998056
1976	25.70158784483082
1977	25.001248957970095
1978	26.21651671165009
1979	26.708498628513368
1980	26.011920138210666
1981	24.57703590302774
1982	24.003740652979378
1983	22.784792150341847
1984	23.836131182371716
1985	23.73259073803483
1986	24.31856662628193
1987	24.463679647185348
1988	25.21380568107062
1989	25.866651291495618
1990	26.144443419514495
1991	26.453780425317685
1992	25.425175290497315
1993	24.675913096975595
1994	24.860512088439375
1995	25.471852328947453
1996	24.92622474483525
1997	25.63688324141062
1998	26.14287050843404
1999	26.524467087608972
2000	26.913574906529053
2001	26.91267587341993
2002	27.621394682308285
2003	26.936982381710262
2004	27.246686235750158
2005	26.84399958547678
2006	27.52645996286
2007	29.239468822176594
2008	28.90259325996348
2009	25.834221449901996
2010	26.005536933437295
2011	26.72369267645241
2012	26.679494411853096
2013	26.421193281347733
2014	26.800703367144628
2015	27.555477438399013
2016	28.08704336690501
2017	28.001601789594577
2018	28.726922695476354
2019	28.98326940195649
2020	29.104334113981828
2021	28.422884314244083
2022	28.20436599951648
2023	27.947907421619654