tablesorter works on all except one
<p>I have a tablesorter that works on all except one column.
See <a href="http://www.dbno.us/finance/beta/old.php?index=sp100" rel="nofollow">http://www.dbno.us/finance/beta/old.php?index=sp100</a></p>

<p>When you click on P/E, it sorts incorrectly. On ascending order, it will put 223.68 ahead of 23.30. On descending order, it will put 9.22 ahead of 86.85.</p>
