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:
Mark Chelgren
Table title:
Electoral History
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Election </th><th colspan=2 rowspan=1 > Political result </th><th colspan=2 rowspan=1 > Candidate </th><th colspan=1 rowspan=1 > Party </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > Iowa's 47th Senate District election, 2010 </td><td colspan=1 rowspan=2 >  </td><td colspan=1 rowspan=2 > Republican gain from Democratic </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > Mark Chelgren </td><td colspan=1 rowspan=1 > Republican </td><td class="highlighted"  colspan=1 rowspan=1 > 9,583 </td><td colspan=1 rowspan=1 > 50.0 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Keith Kreiman </td><td class="highlighted"  colspan=1 rowspan=1 > Democratic </td><td class="highlighted"  colspan=1 rowspan=1 > 9,572 </td><td colspan=1 rowspan=1 > 50.0 </td></tr>
<tr> <td colspan=1 rowspan=2 > Iowa's 41st Senate District election, 2014 </td><td colspan=1 rowspan=2 >  </td><td colspan=1 rowspan=2 > Republican hold </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Mark Chelgren </td><td colspan=1 rowspan=1 > Republican </td><td colspan=1 rowspan=1 > 10,356 </td><td colspan=1 rowspan=1 > 50.8 </td></tr>
<tr> <td colspan=1 rowspan=1 > Steve Siegel </td><td colspan=1 rowspan=1 > Democratic </td><td colspan=1 rowspan=1 > 9,982 </td><td colspan=1 rowspan=1 > 49.0 </td></tr>
</table>
Question:
How many vote did Chelgren defeat Keith Kreiman with in 2010?
Answer:
In 2010, Chelgren was elected to the Iowa Senate, defeating Democrat Keith Kreiman with 9,572 to 9,582 votes.