Tableau en html

Bonjour,
je lit des données a partir d'une base oracle et je remplit dans un tableau html/php, le problème les cellule vide (données null) ne sont pas cadré alors que je veut que toutes mes cellules soient cadré
voici le code :
<table width="235" border="1">
<tr>
<td nowrap align=center ><span class="Style9">Type</span></td>
<td nowrap align=center ><span class="Style9">Année</span></td>
<td nowrap align=center ><span class="Style9">Trim</span></td>
<td nowrap align=center ><span class="Style9">Mois</span></td>
<td nowrap align=center ><span class="Style9">Code Emp</span></td>
<td nowrap align=center ><span class="Style9">Raison Sociale</span></td>
<td nowrap align=center ><span class="Style9">Folio</span></td>
<td nowrap align=center ><span class="Style9">Ligne</span></td>
<td nowrap align=center ><span class="Style9">Durée</span></td>
<td nowrap align=center ><span class="Style9">Unité</span></td>
<td nowrap align=center ><span class="Style9">Salaire</span></td>
<td nowrap align=center ><span class="Style9">Date E</span></td>
<td nowrap align=center><span class="Style9">Date S</span></td>
</tr>
<?php while (OCIFetch($sql_statement)) { ?>
<tr>
<td nowrap align=center><span class="Style9"><?php echo OCIResult($sql_statement, "TYPDAS"); ?></span></td>
<td nowrap align=center><span class="Style9"><?php echo OCIResult($sql_statement, "ANNDAS"); ?></span></td>
<td nowrap align=center><span class="Style9"><?php echo OCIResult($sql_statement, "NUMTRI"); ?></span></td>
<td nowrap align=center><span class="Style9"><?php echo OCIResult($sql_statement, "CODMOI"); ?></span></td>
<td nowrap align=center><span class="Style9"><?php echo OCIResult($sql_statement, "NEMPL"); ?></span></td>
<td nowrap align=left> <span class="Style9" ><?php echo OCIResult($sql_statement, "RAIEMP"); ?></span></td>
<td nowrap align=RIGHT><span class="Style9"><?php echo OCIResult($sql_statement, "NUMFOL"); ?></span></td>
<td nowrap align=RIGHT><span class="Style9"><?php echo OCIResult($sql_statement, "NUMLIG"); ?></span></td>
<td nowrap align=RIGHT><span class="Style9"><?php echo OCIResult($sql_statement, "DURTRA"); ?></span></td>
<td nowrap align=center><span class="Style9"><?php echo OCIResult($sql_statement, "CODTPD"); ?></span></td>
<td nowrap align=RIGHT><span class="Style9"><?php echo OCIResult($sql_statement, "MTCOAS"); ?></span></td>
<td nowrap align=center><span class="Style9"><?php echo OCIResult($sql_statement, "DENT"); ?></span></td>
<td nowrap align=center><span class="Style9"><?php echo OCIResult($sql_statement, "DSOR"); ?></span></td></tr>