How well do police stations keep track of how many officers they have?

i would assume exactly the same as any employer does with their employees.

Very well since the have to pay these officers. In addition they have every persons social security number so it can be pretty easy just to count.

Its not that hard. Our town only has 5 policemen.

that would be easy...how many are on active duty

your kidding right? duh they know the exact number of employees they have, they have to pay them? duh!!!!!!