Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
1972 United States Senate elections
Table title:
Delaware
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Party </th><th colspan=1 rowspan=1 > Candidate </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th><th colspan=1 rowspan=1 > ± </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Democratic </td><td class="highlighted"  colspan=1 rowspan=1 > Joe Biden </td><td colspan=1 rowspan=1 > 116,006 </td><td colspan=1 rowspan=1 > 50.48% </td><td colspan=1 rowspan=1 > +9.59% </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Republican </td><td colspan=1 rowspan=1 > J. Caleb Boggs (Incumbent) </td><td colspan=1 rowspan=1 > 112,844 </td><td colspan=1 rowspan=1 > 49.10% </td><td colspan=1 rowspan=1 > 10.02% </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > American </td><td colspan=1 rowspan=1 > Henry Majka </td><td colspan=1 rowspan=1 > 803 </td><td colspan=1 rowspan=1 > 0.35% </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Prohibition </td><td colspan=1 rowspan=1 > Herbert B. Wood </td><td colspan=1 rowspan=1 > 175 </td><td colspan=1 rowspan=1 > 0.07% </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=3 rowspan=1 > Majority </th><td class="highlighted"  colspan=1 rowspan=1 > 3,162 </td><td colspan=1 rowspan=1 > 1.38% </td><td colspan=1 rowspan=1 > 16.86% </td></tr>
<tr> <th colspan=3 rowspan=1 > Turnout </th><td colspan=1 rowspan=1 > 229,828 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=4 rowspan=1 > Democratic gain from Republican </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
How did Biden do in the 1972 US Senate election?
Answer:
Biden won the 1972 United States Senate elections by a margin of 3,162 votes.