Year	% of central government expense
1972	0.9925273283958443
1973	0.8905995851707464
1974	0.3895713792604393
1975	5.355053428616372
1976	0.3926801995841608
1977	0.28209205218803474
1978	0.08721126302616249
1979	-0.5679699635921363
1980	-0.10740470816657287
1981	0.006261676922266531
1982	-0.013664091405295764
1983	0.14411504349907958
1984	0.19757890717223434
1985	1.0826160787401988
1986	0.08211369266506882
1987	0.6154250001306112
1988	1.0358346905663038
1989	1.2962113034470042
1990	1.958025089680035
1991	1.9280085657500194
1992	1.7917947241851446
1993	2.1846150500834733
1994	1.7037512168008366
1995	1.4470767446948307
1996	1.5895970174310505
1997	0.961048314725387
1998	0.761544805704092
1999	0.5032594464579593
2000	0.320348023042989
2001	0.38911011511014737
2002	-0.050078301447655696
2003	0.5430964298176232
2004	0.2999435148089524
2005	0.8112404051552953
2006	0.40461198216537886
2007	0.38651980129828184
2008	0.3128563571365457
2009	0.20937822190210081
2010	0.4147315712869638
2011	0.32894065022972757
2012	0.24073242793484756
2013	0.14379670913459744
2014	0.4576176630239599
2015	0.1035770911790932
2016	0.3234237716052813
2017	0.11393079358502033