The victims were largely concentrated in Afghanistan, Iraq, Nigeria, Pakistan and Syria - up to 77 percent of the total.
Parts of Iraq and Syria are under the influence of Sunni Armed Forces while Boko Haram is actively exercising its power in Nigeria.
Among the five countries, Iraq had the highest number of victims, at 9,929. The largest increase in number of victims was in Nigeria - 300 percent.
Meanwhile, 35 countries including South Korea, North Korea and Japan did not suffer any terrorist attacks.
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Articles by Korea Herald