Google’s Panda Update Has Turned Two.

This would make for the 23rd Panda update since the first Panda algorithm was introduced on February 24, 2011. Since then Google had 22 updates both to the algorithm and also to the index or data refreshes came this year.

The latest impacted 1.3% of the queries, whereas version 22 impacted only 0.8% of English queries in Google.

Source:Googleseoupdates