The Bureau of Investigative Journalism has a comprehensive year-end report on U.S. drone strikes in 2012, month-by-month and country-by-country.
“Drone strikes in Pakistan are now at their lowest level in five years, as Islamabad protests almost every attack. The CIA also appears to have abandoned ‘signature strikes’ on suspected militants fitting certain patterns of behaviour – at least for the present. Almost all attacks in recent months have been against named al Qaeda and other militant leaders.
“As drone strikes fell in Pakistan they rose steeply in Yemen, as US forces aided a major military campaign to oust al Qaeda and other Islamists from southern cities. A parallel CIA targeted killing programme killed numerous alleged militants, many of them named individuals. Yet US officials took more than three months to confirm that American planes or drones had killed 12 civilians.”