All data is end of semester data.
The number actually starting the first semester or each subsequent semester is unknown. History data is not retained for those withdrawing before a W grade is required. A W grade is not required until the 4th week of the semester. In addition, a student is counted as present at the end of a semester if he or she receives a grade in any course including a W grade. Consequently, students receiving W grades in all courses are nontheless counted as present or persisting for that semester.