Passage: The official form of Islam is Sunni of the Hanbali school, in its Salafi version. According to official statistics, 75–85% of Saudi Arabian citizens are Sunni Muslims, 10–15% are Shia. (More than 30% of the population is made up of foreign workers  who are predominantly but not entirely Muslim.) It is unknown how many Ahmadis there are in the country. The two holiest cities of Islam, Mecca and Medina, are in Saudi Arabia. For many reasons, non-Muslims are not permitted to enter the holy cities although some Western non-Muslims have been able to enter, disguised as Muslims.

Question: What religion are most of the workers?
Muslim