Year	% of central government expense
1990	21.275108870460475
1991	19.85022086929121
1992	19.826204891742854
1993	23.578205818504816
1994	11.446613942515578
2000	3.646976287944239
2001	8.900211501199164
2002	27.755589459726828
2003	0.08908154520232082
2004	-0.07497292476745339
2005	2.154306284721794
2006	3.9625816042826347
2007	2.4803271730759526
2008	23.614781134176745
2009	1.6093560636448438
2010	5.846757227154716
2011	7.152558431046336
2012	10.74149972221556
2013	14.473402179896421