Year % of total taxes 1972 31.80616740088103 1973 32.00655584172329 1974 36.55244029075818 1975 39.58080720595865 1976 42.06626590241849 1977 43.79048469957558 1978 47.40531760280411 1979 50.089740828487365 1980 52.627339199405085 1981 50.78489150817034 1982 48.540513336688285 1983 48.90737616929911 1984 50.88910884330532 1985 48.68574086996978 1986 41.57396286597506 1987 50.19914465737332 1988 50.718880621350046 1989 55.687587508370285 1990 57.16862772482347 1991 58.11156439578097 1992 57.305889742474704 1993 59.259929612870785 1994 55.614335742493125 2012 40.173801200448516 2013 42.78136066564938 2014 42.685082418711715 2015 40.99421889799784 2016 40.53167604854717 2017 40.61467055539875 2018 42.4161207067699 2019 41.27983368469 2020 40.966926146915874 2021 43.63330722026374 2022 46.92147663928845