Simplify the following text for a Grade 7 native English-speaking person.
Original: The current ISO 4217 code for the peso is MXN ; prior to the 1993 revaluation ( see below ) , the code MXP was used .
Simplified: The current ISO 4217 code for the peso is MXN ; before its value was changed in 1993 , the code MXP was used .