How do i get the 1.1% instead of 1% for the FERS Basic Annuity Formula Computation?

The following explains the 1.1% vs 1% FERS Basic Annuity Formula Computation (opm.gov):

Under Age 62 at Separation for Retirement, OR Age 62 or Older With Less Than 20 Years of Service Formula: 1 percent of your high-3 average salary for each year of service

Age 62 or Older at Separation With 20 or More Years of Service Formula: 1.1 percent of your high-3 average salary for each year of service

Source: www.opm.gov

1% vs 1.1% FERS Basic Annuity Formula, FERS Basic Annuity Formula Computation,