The monthly Android version distribution numbers are up for September on the Android Developers site, and things appear to be moving just the way you'd expect.

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Month over month, we saw a 2.2% decline in share for Gingerbread, a drop of 1% for Ice Cream Sandwich, 1.4% for Jelly Bean 4.1, and small gains of 0.9% and 0.1% for Jelly Bean 4.2 and 4.3, respectively. KitKat was this month's biggest mover, adding 3.6% to its share of the pie, bringing it to 24.5% of all Android devices active in the last week.

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