New Data on Immigration Prosecutions

From TRAC:

After several months of moderation, U.S. federal immigration prosecutions have returned to the high levels of last summer. According to the most recent figures released by the Department of Justice, there were 8,287 immigration prosecutions in March 2010, up 30 percent from February and more than in any month since July 2009.

What’s the over/under on the “Arizona effect”? A year? Less?