that statement in itself is highly debatable....but not the subject of this thread.
From The Papacy: The Ministry of St. Peter in the New Testament (2 of 6)
How many Catholics are in the world? (1 billion 30 million approx.)
What fraction of the world's population is this? (1 of 6)
There are approximately 21,000 Christian denominations in the world, along with hundreds, if not thousands of other religions. Methinks one could safely make the claim that Catholicism represents a goodly portion of the world's Christian population. And, since the Catholic Church accepts the validity of evolution (as has been pointed out many times), and since there are numerous non-Catholic Christians that accept the validity of evolution, it could also safely be claimed that those Christians that deny the validity of evolution would be in the minority.