A CTC report which in summary says:
al-Shabaab has deployed at least 216 suicide attackers who carried out a total of 155 suicide bombing attacks, killing at least 595 and as many as 2,218 people. Their data indicates that al-Shabaab’s suicide attacks are highly targeted, aimed at degrading the Somali state and members of the international community (United Nations, African Union, or African Union Mission in Somalia (AMISOM)) that are combating it. Unlike certain other terrorist groups, al-Shabaab’s suicide attacks tend to attempt to avoid targeting non-combatant civilians, and thus do not seem to be undertaken simply to engender shock and awe.
Link:https://ctc.usma.edu/targeted-terror...rs-al-shabaab/