Our school system graduates around 400 every year. The event is held in a large religious temple, which seats thousands and is a round building.
The district has a large contingent of Pacific Islanders. If i were to guess, i would say they represent 15% of the graduating class. They are very "family" oriented, and mostly all related in some form or fashion. Very supportive of their kids - everyone in the family comes to graduation. I am guessing there were 400 of their family at graduation.
They are also "extremely" vocal for "every" distant relative that graduates So you are talking several hundred people screaming their heads off for their family in a round auditorium.
Even though the district makes a comment to hold applause - most everyone's family choose to make a bit of noise - kind of like - if you can't beat them, join them. So many grads are getting vocal recognition, the kids that don't get any applause probably feel left out. So our family made a bit of noise for just a few seconds, stopping in plenty of time to hear the next grads name.