I got 47.29% by March 31, 2012, with numbers from Sam and Desi (Codeshare commitee)

Since March 31 2012 Delta has cut more European destinations:

ATL Paris: cut one of three daily flights
ATL Barcelona: cut
ATL Milan: cut
JFK Prague: cut
JFK Rome: cut
JFK Athens cut

In the same time, AF reduced twice daily service from Paris to Dulles to one A380...and KLM cancelled MIA Amsterdam.

It's not really rocket science to see how we would be below the 47.x% at this point unless AFKLM/AZ makes massive cuts to match. None have been announced.

Cheers
George