Displaying multiple records into the table column does not work

<form action="Report_customerHistory.php" method="POST">
<table align="center" border="0" align="center" style="width:40%">
    <tr>
        <th>
           
        </th>
        <th>
            
        </th>
        <th>
            
        </th>
    </tr>
    <tr>
        <td>
            <select name="VehicleNo">
                <option selected="" value="Default">(Please select.)</option>
                <?php
                include_once('db.php');
                
                $result=mysqli_query($con,"SELECT * FROM vehicle_customer");
                while($rawR1 = mysqli_fetch_array($result))
                {
                    $rawsData1=$rawR1['veh_reg_no']; 
                   
                ?>
                 <option value="<?php echo $rawsData1; ?>"><?php echo $rawsData1;?></option>
                <?php
                }
                ?>
            </select>
        </td>
        <td>
            
        </td>
        <td>
            
        </td>
    </tr>
</table>