The United States has consistently claimed only a tiny number of non-combatants have been killed in drone attacks in Pakistan - despite research by the Bureau and others suggesting that over 400 civilians may have died in the nine-year campaign.
Of 746 people listed as killed in the drone strikes outlined in the document, at least 147 of the dead are clearly stated to be civilian victims, 94 of those are said to be children. (Source)
I haven't kept up on terrorism statistics this year or really over previous years. The only research I ever did in this area was comparing civilians killed by Hamas in Israel, and civilians killed by the Israeli military (usually in Gaza). Best I can recall, the Israeli government killed far more civilians than Hamas did over a 5-10 year period.
To think that the United States has killed more civilians in Pakistan over the past 10 years than Hamas has in Israel is staggering.