I want to know the answer to the following question:
How many Muslims fled the Balkans with the Ottoman armies?
All the background I'm provided with is that "As the Ottoman Empire gradually shrank in size, some 7–9 million Turkish-Muslims from its former territories in the Caucasus, Crimea, Balkans, and the Mediterranean islands migrated to Anatolia and Eastern Thrace.". Is that enough to answer the question?