Codecademy - Example with thead, tbody and tfooter elements

<table>
  <thead>
    <tr>
      <th>Quarter</th>
      <th>Revenue</th>
      <th>Costs</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th>Q1</th>
      <td>$10M</td>
      <td>$7.5M</td>
    </tr>
    <tr>
      <th>Q2</th>
      <td>$12M</td>
      <td>$5M</td>
    </tr>
  </tbody>
  <tfoot>
    <tr>
      <th>Total</th>
      <td>$22M</td>
      <td>$12.5M</td>
    </tr>
  </tfoot>
</table>