The number following the command is the damage score. These scores were taken mainly from the command list demo within the game. When not all strikes connect in the demo I've tried to execute them on an opponent who is against a wall. It's not possible to give a totally accurate list of damage scores since other factors can affect damage - such as being knocked against a wall or attacking from a power stance - however they do show the relative values of the moves.

+ before the number indicates a follow-on combo - the score being added to that of the previous combo.
+ after the number indicates that the combo can potentially score higher but I haven't been able to make all strikes connect.
? indicates that the move doesn't score and I don't know what use, if any, it has.