From article:
CryoSat was designed to measure sea-ice thickness across the entire Arctic Ocean, and has allowed scientists, for the first time, to monitor the overall change in volume accurately.
About 90% of the increase is due to growth of multiyear ice which survives through more than one summer without melting with only 10% growth of first year ice. Thick, multiyear ice indicates healthy Arctic sea-ice cover.
This years multiyear ice is now on average about 20%, or around 30 cm, thicker than last year.
That sounds better. Can believe 20 % in one year.
So we are about 20 % colder then one year ago.