A member under municipal fire member coverage plan 5 shall contribute sixteen and two-tenths percent of salary with the first full pay period in the calendar month in which municipal fire member coverage plan 5 becomes applicable to the member, except that a member whose annual salary is greater than twenty-five thousand dollars ($25,000) shall contribute:
A. beginning July 1, 2021 and continuing through June 30, 2022, nineteen and two-tenths percent of salary;
B. beginning July 1, 2022 and continuing through June 30, 2023, nineteen and seven-tenths percent of salary;
C. beginning July 1, 2023 and continuing through June 30, 2024, twenty and two-tenths percent of salary;
D. beginning July 1, 2024 and continuing through June 30, 2025, twenty and seven-tenths percent of salary; and
E. beginning July 1, 2025 and thereafter, twenty-one and two-tenths percent of salary.