Foreign workers in Saudi Arabia

Foreign workers in Saudi Arabia (Arabic: العَمالَة الأَجْنَبِيَّة فِي السَعُودِيَّة, romanized: al-ʿamālah al-ʾāǧnabīyah fī as-Saʿūdīyah), estimated to number about 9 million as of April 2013, began migrating to the country soon after crude oil was discovered in the late 1930s. Initially, the main influx was composed of Arab and Western technical, professional and administrative personnel, but subsequently substantial numbers came from South and Southeast Asia.

Source: Wikipedia — Foreign workers in Saudi Arabia (CC BY-SA 4.0)