[source](https://www.w3.org/WAI/tutorials/tables/irregular/) <table> <col> <colgroup span="2"></colgroup> <colgroup span="2"></colgroup> <tr> <td rowspan="2"></td> <th colspan="2" scope="colgroup">Mars</th> <th colspan="2" scope="colgroup">Venus</th> </tr> <tr> <th scope="col">Produced</th> <th scope="col">Sold</th> <th scope="col">Produced</th> <th scope="col">Sold</th> </tr> <tr> <th scope="row">Teddy Bears</th> <td>50,000</td> <td>30,000</td> <td>100,000</td> <td>80,000</td> </tr> <tr> <th scope="row">Board Games</th> <td>10,000</td> <td>5,000</td> <td>12,000</td> <td>9,000</td> </tr> </table>
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