I would use the on *:text command, and why not use an ini file?

var %voices = $gettok($readini(status.ini,voices),1-,44) or even exclude the local variable and use

 if ($istok($readini(status.ini,voices),$nick,44) { etc } 

I would also make an alias to add nicks. For example:

alias addstat { 
 if ($istok($readini(status.ini,$1),$2-,44){ $addtok($readini(status.ini,voices), $2-,44) }
 else { writeini -n status.ini $1 nicks $2- }
}