On Oct 7, 2013, at 7:29 PM, Aaron Yi DING <Aaron.Ding@xxxxxxxxxxxx> wrote: > Is there a pointer (maybe from IETF secretary)? The year with highest number of attendees - which one is that? The exact number of participants will be even better. Wasn't it in Berlin? ISTR that we had a remarkably good attendance. If not, it would have been probably the IETF in San Jose, quite some time ago.