for (my $i=100; $i <= 1000; $i += 100) {
            if ($num_matched <= $i) {
                $rows = $i / 10;
                last;
            }
        }
        unless ($rows) {
            for (my $i=2000; $i <= 10000; $i += 1000) {
                if ($num_matched <= $i) {
                    $rows = $i / 10;
                    last;
                }
            }
        }
        $rows = 1000 if $num_matched > 10000;