It appears that we have the final number of ballistic missiles deployed in 2014. According to Sergey Shoigu, Russia's strategic forces received 38 intercontinental missiles this year. Of these, 22 are SLBMs, so the number of ICBMs is 16.
This confirms the earlier reports about 16 ICBMs deployed in 2014. As for SLBMs, we know that Yuri Dolgorukiy has the full complement of 16 missiles on board. This leaves six more SLBMs to account for. It's not clear if the tree missiles expended in flight tests in 2014 are included in the total - they probably should be. In any event, the second and third submarines of the Project 955 class - Alexander Nevskiy and Vladimir Monomakh - don't seem to be loaded yet.
In 2015 the strategic forces will receive "more than 50 missiles" - this number includes SLBMs on Alexander Nevskiy and Vladimir Monomakh and ICBMs in four regiments. Taking into account the three SLBMs that have been delivered in 2014, it would take additional 29 Bulava SLBMs to arm these two submarines. Six RS-24 ICBMs will bring the silo-based regiment in Kozelsk to full force. Arming three mobile RS-4 (and/or RS-26) regiments will, strictly speaking, require 27 missiles, but one of these regiments might be the one in Nizhniy Tagil, which already has six ICBMs, so the total mobile RS-24 count might be 21. And at least one regiment might be still incomplete by the end of 2014, so it could be, say, 15 or 18, so the total 2015 missile count would be somewhere between 50 and 53 (29 Bulava SLBMs + 6 silo RS-24 + 15-18 mobile RS-24).