Year	% of central government expense
1998	14.294428567560791
1999	12.32173219134391
2000	10.872266931147506
2001	8.96572491221217
2002	9.740726540955368
2003	9.203778597751295
2004	8.814855945696973
2005	7.260010150960758
2006	4.944655740926125
2007	3.1010703012242318
2008	5.966082493866139
2009	6.444425125601569
2010	6.789242399149918
2011	5.89053602994005
2012	4.489883494193614
2013	3.344670741341665
2014	1.9063190787397013
2015	1.6812500953730019
2016	2.2971600131703434
2017	2.4431874164387746
2018	3.939262172668972
2019	4.551806181366533
2020	4.051942088252973
2021	2.4882438008980734