It's not fiction, exactly. Most places don't know how large their population is, that's why censuses are carried out. The city I live in knows a minimum number

It's not fiction, exactly. Most places don't know how large their population is, that's why censuses are carried out. The city I live in knows a minimum number of vaccinations that have been carried out within city limits, and a maximum, but it doesn't really know how many of the people vaccinated live within city limits and how many live in the suburbs, and also doesn't really know how many people live within city limits. Calculating the percentage is a matter of dividing one approximate number by another, or if you will, dividing one number that doesn't mean exaxtly what readers assume with another that also doesn't mean exactly what readers assume. I know that these problems are common. People move in with their SOs without filing paperwork everywhere, not just here. However, if you want to keep track of how many people are vaccinated, you are going to have a counter. And if you want to tax people, you are going to have a number of inhabitants. Dividing one by the other is tempting, and it's accurate when you start doing it, because when 2% or 12% of the taxpayers have been vaccinated the count is fairly accurate. It only becomes really inaccurate as you approach 100%, and by that time changing the way you count breaks your time series, if you're using this data yourself.