No data for the following. One important "fact" people do not know is much of the western philosophical works (and other disciplines) we know today (from Aristotle, Plato, Socrates, etc...) are from Arabic writings. Apparently when the Muslim Arabs decided to go and conquer the West, they would take down libraries and rewrite all the knowledge in one language (Arabic). They sent out paid emissaries to the "Four corners of the world" to gather all human knowledge. To that end, Greek works were translated into Arabic and saved in their libraries in Iraq and elsewhere in the Middle East.
>One important "fact" people do not know is much of the western philosophical works (and other disciplines) we know today (from Aristotle, Plato, Socrates, etc...) are from Arabic writings
This statement greatly distorts the truth. Almost all extant Greek philosophical texts can be traced to 17 Byzantine manuscripts.
The book reviewed here has much more information about the transmission of Greek philosophy (the review is well-worth reading too):
