We are roughly the same, 15 in total and only 5 with tickets.They'll be somewhere in the region of 7-9k heading over imo, would be surprised if it was over the 10k figure. Hard to gauge though due to only having 2.5k tickets.
FWIW out of our travelling group of 17, only 6 of us have tickets so if that's replicated over the course it'll be huge travelling numbers.
Can't wait to sample the sights of Amsterdam and see us win at the De Kuip!