If I understand you correctly, you need to have the report of the Statut field per month, correct?
If so, just extract the Month from your Date field in the script:
Month(date) & '-' & Year(date) as MonthYear,
And create a chart using MonthYear as dimension and needed aggregate function (Count, Sum, Max, etc of Statut) as Measure:
sum(Statut), for example....