Google normally releases chart with the latest distribution numbers for its different Android builds. And for the month of December, nothing much has changed, Android Nougat (7.0) was found on just .4% of devices powered by Google's open source OS.
A lot of people still seems to be stocked on Android 4 Kitkat, and woe betide that device that defies upgrade.
The new numbers for December show a very small 1% decline to 34% for Lollipop. That breaks down to 10.8% for Android 5.0 and 23.2% for Android 5.1%. Combined, the Lollipop build remains the most widely used on Android devices. Second place goes to Android 6.0 Marshmallow, currently installed in 26.3% of Android devices. Phones and tablets powered by Android 4.4 KitKat (24%), Android 4.1.x, 4.2.x and 4.3 Jelly Bean (12.8%), Android 4.0.3, 4.0.4 Ice Cream Sandwich (1.2%) and Android 2.3.3-2.3.7 Gingerbread (1.2%) are next.
The reason KitKat was so long dominant is that Android 5.0 and 5.1 were split into two platform versions because of their differing API levels. So, really, Lollipop remains the "dominant" Android version if we combine the two versions, but Marshmallow is now the single most prevalent version of the platform by individual API level.
Why are you still hanging on Lollipop?