I have revised my paper Copyright Trolling, An Empirical Study (March 21, 2014) (forthcoming in the Iowa Law Review) (http://ssrn.com/abstract=2404950) to include data for all US district courts from 2001 to 2013.
The following are a few of the new figures from the paper. The new data is discussed in the article.
John Doe lawsuits as a percentage of all copyright lawsuits 2010–2013, by State
John Doe Copyright Lawsuits 2010–2013 Selected Districts
Average Number of Doe Defendants per Suit 2001 – 2013