While this does not take into account size of respective fleets (click here for that information) the following graph shows the number of detentions recorded by Paris MOU with respect to Flag State.
About John Konrad
Captain John Konrad is the founder and CEO of gCaptain and author of the book Fire On The Horizon. He is licensed to captain the world's largest ships and has sailed from ports around the world. John has built some of the world's most advanced ships and managed billion-dollar offshore construction projects in some of the world's harshest marine environments. John is a distinguished alumnus of New York Maritime College.