The affiliated public employer shall contribute the following percentages of the salary of each member it employs and covers under municipal fire member coverage plan 2:
A. prior to July 1, 2022, eighteen and fifteen-hundredths percent of salary;
B. beginning July 1, 2022 and continuing through June 30, 2023, eighteen and sixty-five hundredths percent of salary;
C. beginning July 1, 2023 and continuing through June 30, 2024, nineteen and fifteen-hundredths percent of salary;
D. beginning July 1, 2024 and continuing through June 30, 2025, nineteen and sixty-five hundredths percent of salary; and
E. beginning July 1, 2025 and thereafter, twenty and fifteen-hundredths percent of salary.