Year	% of central government expense
1972	7.552528823887944
1973	2.1068602075594085
1974	1.1537930718783678
1975	0.8929771248620886
1976	1.7398446768496567
1977	0.9953507957503858
1978	1.6593070923812785
1979	3.4774119342847216
1980	7.590680163856972
1981	6.495621512276791
1983	3.4370062115428266
1984	2.2877921671464034
1985	1.6014616241829407
1986	3.286589911805584
1987	3.008492803478621
1988	2.1473381865077537
1989	0.9026937870134844
1990	5.658154269139649
1991	5.542468690029469
1992	1.186818248340663
1993	1.0820301995808583
1994	0.6921203061619674
1995	0.8837218134616704
1996	0.5386995990991538
1997	0.012912753695335693
1998	0.04659118716672939
2008	0.4805703904430282
2009	0.5875905379459511
2010	0.41089820571725216
2011	1.2921673033635566
2012	1.1948239436013472
2013	1.0210087884524115
2014	1.2495710788045333
2015	0.857771867573359
2016	1.3541608793900448
2017	1.1590442417838003
2018	0.4576921849860618
2019	0.2586974870318341
2020	0.22098012293641534
2021	0.4176849208142979
2022	0.29733650911757087