Original sentence: In 2007, the officially registered British-born population of Spain numbered 315,000 (though various estimates place the true figure significantly higher, ranging from 700,000 to more than 1,000,000), constituting 8.09% of the foreign population and making Britain the fourth most common country from which migrants to Spain originate (behind Morocco, Romania, and Ecuador)
Edited sentence: In 2007, the officially registered British-born population of Spain numbered 315,000 (though various estimates place the true figure significantly higher, ranging from 700,000 to more than 1,000,000), constituting 8.09% of the foreign population and making Britain the fourth most common country from which migrants to Spain come (behind Morocco, Romania, and Ecuador)