<font face="Verdana, Arial, Helvetica, sans-serif" size="2">But I would bet that out of CDG, AMS, FRA, etc. locally originating traffic is < 25% of enplanements. </font>
I think this is way too low as well. Pre-9/11, my FRA flights were heavily German, my AMS flights seemed an even split, and my CDG flights seemed heavily American, though not 75% American.
This was all pre-9/11. Some Europeans may be more reluctant to fly US carriers now.