...
while (<FILE>) {
   my $line=$_;
   (my $day,$month,$year,$hour,$minute) = ( $line =~ /^.*\[(\d*)\/(.*)\/(\d*):(\d*):(\d*).*$/);
   if ( defined $topHash{$year}{$month}{$day}{$hour}{$minute} ) {
      $minuteCounter=$topHash{$year}{$month}{$day}{$hour}{$minute};
      $minuteCounter++;
      $topHash{$year}{$month}{$day}{$hour}{$minute}=$minuteCounter;
   } else {
      $topHash{$year}{$month}{$day}{$hour}{$minute}=1;
      $minuteCounter=$topHash{$year}{$month}{$day}{$hour}{$minute};
   }
}
close(FILE);
foreach my $ryear ( sort keys %topHash ) {
   foreach my $rmonth ( sort keys %{$topHash{$ryear}} ) {
      foreach my $rday ( sort keys %{$topHash{$ryear}{$rmonth}} ) {
         foreach my $rhour ( sort keys %{$topHash{$ryear}{$rmonth}{$rday}} ) {
            foreach my $rminute ( sort keys %{$topHash{$ryear}{$rmonth}{$rday}{$rhour}} ) {
               print "\"$ryear\"\t\"$rmonth\"\t\"$rday\"\t\"$rhour\"\t\"$rminute\"\t";
               print "\"$topHash{'$ryear'}{'$rmonth'}{'$rday'}{'$rhour'}{'$rminute'}\"\n";
            }
         }
      }
   }
}