The number of lives lost to terrorism increased by 80 percent in 2014, reaching 32,658 — the highest level ever recorded. This compares to 18,111 in 2013.

According to the third edition of the Global Terrorism Index (GTI), released Monday this increase represents the largest yearly increase in deaths ever recorded. The report also highlights the dramatic rise in terrorism over time, with deaths increasing by nine-fold since the year 2000.

The report reveals that just two terrorist groups, ISIL and Boko Haram, are now jointly responsible for 51 percent of all global fatalities from claimed terrorist attacks. Boko Haram, which pledged its allegiance to ISIS as the Islamic State’s West Africa Province (ISWAP) in March 2015, has become the world’s deadliest terrorist group, causing 6,644 deaths compared to ISIS’s6,073.

Terrorism is also highly concentrated: just five countries — Afghanistan, Iraq, Nigeria, Pakistan, and Syria — accounted for 78 percent of all deaths in 2014. Iraq continues to be the country most impacted by terrorism, with 3,370 attacks killing 9,929 people.

This is the highest number of terrorism incidents and fatalities ever recorded by a single country. Nigeria recorded the largest increase in deaths from terrorism, rising by over 300 percent to 7,512 fatalities.

Terrorism has spread significantly in the past year. The number of countries that suffered more than 500 deaths has more than doubled, increasing from five in 2013 to eleven in 2014. The new additions were Somalia, Ukraine, Yemen, Central African Republic, South Sudan, and Cameroon.