In July 2009, just a few months before the surge, insurgent attacks totaled about 2,000, while in July 2012 they attacked about 3,000 times, an increase of about 33%. (Because the precise number of attacks remains classified, precise statistical analysis is impossible.) The same is true for every month in 2009 compared to every month in 2012 for which data exists: The insurgency launched more attacks in 2012 than it did in 2009.
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