The drones hit the country's tribal areas 13 times last year, killing between 60 and 85 people - almost half the 25 strikes in 2014 and 10 times fewer than the campaign's peak of 128 in 2010, BBC Urdu reported.
Why Pakistan's first drone strike should worry Obama
The figures come from the bureau's annual drone report for 2015.
The reduction in drone operations in Pakistan last year could be down to a number of factors, including Pakistani military's 18 month-long operation Zarb-e-Azb in the tribal regions.
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