The first number is the time. The second is the total count of course adds, drops and transfers within that ten minute slice. The rest is a little bar graph for quick comparisons.
The average busy day is about 300. Over 500 is very busy. Under 100 is light.
Enrolment Statistics for add/drop/transfer. Ten minute snapshots: 20200503:11:50 The Bar graph factor is 10. 11:00 - 1 : done.