The minimum was reached in September for modelled sea ice volume as well, and 2016 came in third, just behind 2011 (99 km3 difference) and well behind 2012 (728 km3). In the meantime, despite the early date of minimum and the rapid increase in extent that followed it, 2016 caught up with 2011 a bit and they are practically at a par at the end of September. 2016 clearly belongs in the 2010-2012 group and is much lower than the years preceding that period and the rebound years that followed 2012.
Here's how the differences with previous years have evolved from last month:
And here are the numbers and bar graph that show how this year's total melt stacked up against other years. It is 5th highest, bearing in mind that maximum sea ice volume was second lowest on record back in April after a mild winter, with total accumulation being third lowest in the 2006-2016 record:
Wipneus' version of the PIOMAS volume graph also shows how this year's trend line almost dropped as low as 2011, and has been on a par ever since: