Simplify the following text for a Grade 9 native English-speaking person.
Original: In France , for the purposes of the census , the INSEE has defined several population indicators that allow people who live in more than one place to be counted in each place , to study and keep count of population movement .
Simplified: In France , because of the census , the INSEE has allowed people who live in one place and study in a different place to be counted twice , so as to show how the population moves .