$ jq -r -n -f Create_an_HTML_table.jq
<table>
  <thead align = 'right'>
    <tr>
      <td></td>
      <td>X</td>
      <td>Y</td>
      <td>Z</td>
    </tr>
  </thead>
  <tbody align = 'right'>
    <tr>
      <td>1</td>
      <td>4</td>
      <td>5</td>
      <td>6</td>
    </tr>
    <tr>
      <td>2</td>
      <td>41</td>
      <td>51</td>
      <td>61</td>
    </tr>
    <tr>
      <td>3</td>
      <td>401</td>
      <td>501</td>
      <td>601</td>
    </tr>
  </tbody
</table>