Congrats to all the 275 graduates.
For context...class of 2005 had 360 students, the number of graduating seniors seemed to cap out in the late 2000's in the low 400's.
When the author had to come back to correct the edition, maybe the series has gotten long enough to require its own index. I can re-run the calc's at the next one, which should be in about 10 days.
