Thank you! What do you mean by "without a sub"?
The displayed skill are just a rough measurement, so two player with profient stamina will most likely have different (but close) values. So proficient ranges from 9,0 to 9,99 the number behind the "," are called the sub. since 10,0 is the maximum value for the stamina skill all players with prominent stamina will have 10,0(or no sub skill).