The net migration rate indicates the contribution of migration to the overall level of population change and does not differentiate between economic migrants, refugees and other types of migrants. Of course it’s not surprising to see Lebanon on top given the number of Syrian refugees entering the country everyday.
In terms of other Arab countries, Qatar came second, followed by Jordan in fifth spot, then Bahrain and UAE in 9th and 10th respectively.
The list was posted on Wikipedia and was taken from the CIA website.
Thanks Oday