About 25 years ago at Cologne we used to see the monthly noise reports.
I was on the Electra at the time and there was never an excedence, however the B727s with JT8s had about 50% of their night departures over the limit.
An interesting entry was for Aeroflot with the IL62. One month there was something like 50 departures with 51 excedences. I suppose it could have been a go-around, but I liked the extra one.
Were the figures for Luton published for crews to see?