Can someone tell me how many non-American based fighters have made The Ring P4P top 10 since 2000?

What has stopped current champions like Chris John, Hozumi Hasegawa and Kessler from entry?

Chris John has a win over current P4P no.2 Marquez. Now whether or not you think Marquez was "robbed," he officially LOST to John. MANY believe Hopkins was robbed against Taylor, this didn't stop Taylor from entering P4P. MANY believe Marquez beat Pacman twice.. this hasn't affected Pac's P4P standing. The OFFICIAL result is accepted.

John also has a win over Jose Rojas, a man that KO'd current P4P 10 ranked Celestino Caballero.

Help?