Washington (CNN) As the Trump administration weighs significant US troop reductions in Afghanistan, the number of attacks carried out by the Taliban and other anti-government forces reached a record high in the last three months of last year, according to a new report from the Special Inspector General for Afghanistan Reconstruction.

Despite the continued violence, the Trump administration says it is considering reducing the number of US troops fighting terrorist groups and assisting local forces in the country from approximately 12,000 to 8,600 even in the absence of an agreement with the Taliban aimed at reducing violence and jump-starting talks between the insurgents and the internationally backed government in Kabul.

"Taliban attacks continued at a high tempo. According to data provided by the NATO Resolute Support mission, enemy-initiated attacks during the fourth quarter of 2019 were at the highest level for a fourth quarter of any year since recording began in 2010," the report said, referring to the NATO-led mission in Afghanistan aimed at training and advising local Afghan forces.

There were 8,204 such "enemy-initiated attacks" during the last three months of 2019, according to the report, with some 37% of those attacks being considered "successful," which are defined as attacks that result in Afghan military, police, international coalition forces or civilian casualties.

While the number of attacks reached a record high, the proportion that were designated successful was similar to the same period in 2018. During the last quarter of 2018 there were 6,974 enemy-initiated attacks, of which 38% were considered successful.

Read More