This is a userbox to be used on user pages.
The userbox requires one parameter, the number of states visited. Setting the value to 0 results in the word "none" in the text; setting it to 13 results in "all". A second value, CDMX, can be used to indicate having visiting Mexico City. For example:
((User:Tcr25/Userbox/User Mexico States Visited|0))
((User:Tcr25/Userbox/User Mexico States Visited|12))
((User:Tcr25/Userbox/User Mexico States Visited|31))
((User:Tcr25/Userbox/User Mexico States Visited|8|CDMX))
((User:Tcr25/Userbox/User Mexico States Visited|31|CDMX))