Annual variation was relatively little and when annual means for the whole country were inspected the only significant difference found was in the mean number of goslings, where brood size was smaller in 2013.
Breytileiki í mældum þáttum var tiltölulega lítill milli ára en þegar heildarmeðaltöl voru skoðuð reyndist aðeins vera marktækur munur á meðalfjölda unga á par og reyndust þeir vera færri 2013.