The Marshmallow-powered devices have definitely increased in recent months. To compare, Android 6.0 Marshmallow finally made it to 1 percent of active devices in February, five months after its release to Nexus devices.
Google reported that Android Lollipop has a total share of around 35.6 percent of active Android devices (with Android 5.0 Lollipop running on 16.2 percent of devices and Android 5.1 Lollipop at 19.4 percent) that check into Google Play. Last month, Android Lollipop had a total share of 35.8 percent of active Android devices - implying Marshmallow's gain was Lollipop's loss.
The Android Developers' webpage shows that Android KitKat is going down steadily on the charts, and now powers 32.5 percent of devices compared to 33.4 percent last month - a decrease of 0.9 percent.
Android Jelly Bean has a combined share of 20.1 percent - falling 1.2 percent from April's 21.3 percent. Android 4.1.x is seen on 7.2 percent devices (down from 7.8 percent), Android 4.2.x on 10 percent (down from 10.5 percent), and Android 4.3 on 2.9 percent devices (down from 3 percent).
Android 4.0.x or Ice Cream Sandwich, in Google's latest numbers, registered a share of 2 percent, down from 2.2 percent in April. Android Gingerbread (v2.3.3-2.3.7) and Android 2.2 Froyo's device distribution shares are 2.2 percent (down from 2.6 percent) and 0.1 percent (same figure as April) respectively in the latest charts. To note, the figures are gathered from devices visiting the Google Play app, which only supports Android 2.2 and above.
The latest OpenGL version distribution numbers, on the other hand, saw OpenGL 2.0 dominating at 49.6 percent, and OpenGL version 3.0 steadily rising to 41.4 percent.