A new report from Super Data offers new estimates for the market size of virtual reality in 2016, suggesting 6.3 million VR headsets were shipped in the whole of 2016.

Last year saw the launch of several high-end VR headsets complemented by new mobile offerings. The report, titled “Can’t Stop Won’t Stop: 2016 Mobile and VR Games Year in Review,” is a compilation of information Super Data and Unity Technologies, though we clarified with Unity that they did not contribute to the estimates for VR headset data in the report.

The report estimates 4.5 million Gear VRs were sold through last year. Clocking in at number two on the list is the PlayStation VR with sales “approaching a million” by the end of 2016. This leaves Oculus, Google and HTC to split about a million units. According to this report, HTC’s Vive edged out Facebook’s Rift selling “more than 400K at its $800 price point.”

The report also notes “Oculus has shown a strong interest in gaming and social applications so consumer penetration will be more important to the Rift. Meanwhile, HTC Vive is becoming the device of choice for enterprise developers…”

We won’t know official numbers until manufacturers themselves start releasing more solid information. Samsung is the only company to have released actual numbers, saying 5 million Gear VR headsets have been sold so far. Last November, before the figure was released by Samsung, Super Data estimated the company would sell far fewer headsets in 2016. This gap between Samsung’s and Super Data’s numbers highlights how different the figures in this report could be from the actual sales numbers. Here’s how Super Data says it arrives at its numbers: