4.2, and 4.3 (collectively, Jelly Bean) made up 59.1% of the ecosystem, and this month it is up to 60.7%; however, the numbers within those three versions have shifted interestingly. All versions of Android from 4.2 down lost share over the past month, except Android 2.2 and 3.2, which stayed the same. The only two versions to gain share were Android 4.3 and Android 4.4. The big winner was Android 4.3 which jumped to 8.9% from 7.8% last month.As of last month, Android 4.1,
Unsurprisingly, Android 4.4 KitKat didn't move too much, going from 1.4% last month to just 1.8%. Of course, there still are only a handful of devices running the latest version of Android, and most of them are Nexus or Motorola devices.
source: Android Developers