Bagaimana cara menghitung jumlah data pada tabel dari hasil code ini ?

<?php
$query = " SELECT TglPajak, current_date() as tglNow FROM masterstnk";
$snc1 = $db1->prepare($query);
$snc1->execute();
$res1 = $snc1->get_result();
if ($res1->num_rows > 0) {
  while ($row = $res1->fetch_assoc()) {
  	$a = $row['TglPajak'];
  	$b = $row['tglNow'];

  	$ax = strtotime($a);
  	$bx = strtotime($b);
  	$hasil = ($ax-$bx)/86400;
  	$data = array();
  	if ($hasil > 7 and $hasil < 100){
?>
<tbody>
        <td><?php echo $a; ?></td>
	<td><?php echo $b; ?></td>
	<td><?php echo (int)$hasil; ?></td>
	<?php } }
 } ?>
</tbody>