China, Egypt, Kenya and Libya are most likely to experience significant increases in terrorist attacks, according to risk experts.
Maplecroft's Terrorism and Security Dashboard found:
- Twelve countries are classed as "extreme risk"; Iraq topped the list, followed by Afghanistan, Pakistan, Somalia, Yemen, Syria, Lebanon and Libya.
- It also includes the growth economies of Nigeria, the Philippines, Colombia and Kenya.
- Iraq, rated as the highest risk country, recorded more than three times as many acts of terrorism as Pakistan with 3,158 attacks resulting in 5,929 deaths - an increase of 2,188 on the previous year.
- In Nigeria, the campaign of violence by Islamic militant group Boko Haram saw the country record the highest number of fatalities per attack, resulting in 3,477 killed - an average of 24 people killed per attack, compared to two deaths per attack in Iraq.
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Mr Osborne said he is "not the person to provide the unity my party needs".