Look at this graph from the Danish Meteorological Institute!

The dark gray line shows the mean from 1990 to 2013. The blue line shows the massive growth this season.

I don’t know if this is an all-time record (perhaps someone can enlighten me), but it sure far surpasses any growth in the past 27 years.

Source:

http://www.dmi.dk/en/groenland/maalinger/greenland-ice-sheet-surface-mass-budget/

Thanks to Bill Sellers for this link