$query="SELECT * FROM figures";
$result=mysql_query($query);
$row=mysql_fetch_array($result);

$jen_year_total="";
$i=1;
while($row=mysql_fetch_array($result))
{
$jen_year_total += $row["blah_$i"];
echo $row["blah_$i"];

$i++;
}
echo $jen_year_total;