Wow, I thought the model had bigger battery for what it costs! My MBP's battery has a design capacity of 6900 mAh!
But I agree, losing 8% capacity so soon doesn't seem right. Mine has 68 cycles and 13 months yet retains 99% capacity (6871/6900). Unfortunately, with a sealed Retina you're at the mercy of Apple. A trip to the Store and a discussion with the "Genius" will be inevitable. Be prepared to hear lots of BS, get some leg pulling or even face outright denial.
I forgot. No recalibration necessary or even possible. These all come "precalibrated" from factory. Draining and recharging, in the old fashioned recalibration procedure, helps none and may even contribute to further battery degradation.