|Image credit: Alternet.org|
Six Million African Muslims Convert to Christianity Each Year.
Of course this claim is complete bogus. This fake statistic is mainly propagated by Robert Spencer run anti-Muslim site, Jihad Watch. An article from Jihad Watch claims:
Perhaps one of the most astonishing statistics thrown out comes from a Muslim cleric, Sheikh Ahmad al-Katani, in an interview conducted by Al-Jazeera television  in 2000. Al-Jazeera quickly deleted the interview, but intrepid Christian evangelicals have managed to retrieve it , and even have the link to the original Arabic transcript . Sheikh Ahmad Al Katani, the president of The Companions Lighthouse for the Science of Islamic Law in Libya, claimed that in Africa (by which he means essentially Black Africa), “On the other hand, the number of Christians has increased from one million in 1902 to 329,882,000. Let us round off that number to 330 million in the year 2000 . …In every hour, 667 Muslims convert to Christianity. Every day, 16,000 Muslims convert to Christianity. Every year, 6 million Muslims convert to Christianity. These are huge numbers….” 
Al Katani does not tell us how he arrived at those extraordinary numbers.
Yeah right, statistics from a religious scholar who doesn't have the qualifications to draft such statistics and with no evidence provided. The way I see it, it doesn't look like statistics at all but what this "scholar" just randomly said in the interview. Al Jazeera probably removed it because they don't want to spread fake news.
So, my conclusion is that there is not even a shred of evidence for this claim.