The death rate among Afghan security forces soared last year, as the Kabul government's overall control of the country dropped significantly, an official US watchdog said in a report Wednesday.

According to the Special Inspector General for Afghanistan Reconstruction (SIGAR), a total of 6,785 Afghan soldiers and police officers were killed between January 1 and November 12, with another 11,777 wounded.

That's an increase of about 35 percent from all of 2015, when some 5,000 security forces were killed.