Year	% of total taxes
1974	24.561133353865106
1975	27.75032509752926
1976	26.690391459074732
1977	26.154534272615454
1978	23.404255319148938
1979	22.819913130638156
1980	21.899954798854903
1981	23.11702996419373
1982	22.441802043208842
1983	20.95776808398447
1984	19.833830421815083
1985	18.947955909027485
1986	18.191402837605807
1987	17.60036108751062
1988	19.454439147251957
1989	18.925984739920214
1990	18.6004099072498
1991	22.10427863060067
1992	23.450835376555865
1993	26.61967686710892
1994	28.872949487507316
1995	29.900123160459202
1996	29.910221959895
1997	27.521209117226615
1998	32.01427091084854
1999	33.5128557454935
2000	36.00280065985243
2001	36.780908697255946
2002	38.26907604524059
2003	41.26347573777453
2004	43.29579810990366
2005	44.26522318599926
2006	47.4727145246583
2007	52.57870308709308
2008	52.781605093689386
2009	58.77728264750763
2010	55.20633687735792
2011	54.81436910238098
2012	52.254155028256974
2013	53.43943942324031
2014	55.21131301519817
2015	50.394085928800045
2016	48.99060101187593
2017	51.24203607281979
2018	50.14850826900029