(1q) FIDUCIARIES, SINGLE INDIVIDUALS, AND HEADS OF HOUSEHOLDS; 2012 TO 2024. The tax to be assessed, levied, and collected upon the taxable incomes of all fiduciaries, except fiduciaries of nuclear decommissioning trust or reserve funds, and single individuals and heads of households shall be computed at the following rates for taxable years beginning after December 31, 2012, and before January 1, 2025:
(a) On all taxable income from $0 to $7,500, 4.40 percent, except that for taxable years beginning after December 31, 2013, 4.0 percent, less fifty hundredths for taxable years beginning after December 2022.
(b) On all taxable income exceeding $7,500 but not exceeding $15,000, 5.84 percent, except that for taxable years beginning after December 31, 2018, 5.21 percent, less eighty-one hundredths for taxable years beginning after December 2022.
(c) On all taxable income exceeding $15,000 but not exceeding $225,000, 6.27 percent, except that for taxable years beginning after December 31, 2020, 5.30 percent.
(d) On all taxable income exceeding $225,000, 7.65 percent.