Calculate Statistics From Log file

This is not a homework assignment.  

I have log files for multiple servers that are kept in a repository.  The log file's filename format is application.servername.timestampinYYYYMMDD.log.

Each of the log files in the directory has the following format:

YYYYMMDD Time-TimeZone    Servername Application PID;  MeasuredStatistic          (XX/YY)  Value for TimeStamp
20030817 000216010-0400 servername application 4567;MeasuredStatisticOne(12/18) 5217
20030817 000216110-0400 servername application 4567;MeasuredStatisticTwo(12/14) 419276
20030817 000216110-0400 servername application 4567;MeasuredStatisticThree(12/31) 57912
20030817 000216110-0400 servername application 4567;MeasuredStatisticFour(12/12) 72
20030817 000216110-0400 servername application 4567;MeasuredStatisticFive(12/13) 1451718

The log files roll over at midnight.  Each statistic is measured at a random interval.

I am trying to write a perl script that will do the following:
For Each server
*determine the number of times that a given statistic appears on a day for a server.  Use that number to calculate the average for the MeasuredStatistic for the day.
* sum the days to determine the totals and averages for the week for a server.
* determine the average for all statics for all servers and export to a csv file to be used in an Excel spreadsheet.
* determine totals for all servers and export to a csv file to be used in an Excel spreadsheet.

I have written the following code, but it is not producing the desired results.
=====Begin code.pl
#! /usr/bin/perl

%module_count = ();
%module_sum = ();

while (<>) {
       chomp;
       next if (/^\s*$/);

       my ($date, $time, $host, $server, $pid, $metric, $value) = split(/\s/);

       $module_count{$module}++;
       $module_sum{$module} += $percent;
}

foreach $module (sort keys %module_count) {
       printf "%s %dx average is %d%%\n",
               $module,
               $module_count{$module},
               $module_sum{$module} / $module_count{$module};
=====End code.pl

How would I script this properly in perl?