Year	% of central government expense
1972	4.072220647746126
1973	2.4997152996592087
1974	0.568507603582392
1975	0.6114160440263955
1976	0.801421650854597
1977	1.5393465623645268
1978	0.49322202915281793
1979	0.5327168783517183
1980	0.4207640982230236
1981	0.36744556670593476
1982	0.24780210686939258
1983	0.4414726179116566
1984	0.48563087673948624
1985	0.6835223621677257
1986	1.9606436517319574
1987	0.947105701328064
1988	1.8479715045945895
1989	1.59620465790285
1990	2.253575456928696
1991	1.5970937675281798
1992	2.0377387720725575
1993	2.6295482477273056
1994	1.4226141189884163
1995	1.3178648877907766
1996	0.6416173541715007
1997	0.5906991314743805
1998	0.41564456715030434
1999	0.4039782452634701
2000	0.3556228070658384
2001	0.2881139117680908
2002	0.4271401861852864
2003	0.5136417022270712
2004	0.6726325589587131
2005	0.3977371314101405
2006	0.4676964934103401
2007	0.5972166876569004
2008	0.4226550429201243
2009	0.549988260358698
2010	0.38736854354916306
2011	0.13056298875276218
2012	0.11098341537626676
2013	0.203411428131017
2014	0.5033774396509683
2015	0.135877690505635
2016	0.09014427768594735
2017	0.20499032308151804