The calculation method is
Statistics from last year's 65438+ 10/month 1 to the same period last year (1), as well as the number of people still on the job in the same period (2)
13 month retention rate =(2)/( 1)
Six-month retention rate and so on.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.