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:
Căușeni District
Table title:
Politics
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > AEI </th><th colspan=1 rowspan=1 > PCRM </th></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td class="highlighted"  colspan=1 rowspan=1 > 51.58% 20,140 </td><td colspan=1 rowspan=1 > 41.19% 16,082 </td></tr>
<tr> <td colspan=1 rowspan=1 > July 2009 </td><td class="highlighted"  colspan=1 rowspan=1 > 50.27% 19,629 </td><td colspan=1 rowspan=1 > 44.26% 17,281 </td></tr>
<tr> <td colspan=1 rowspan=1 > April 2009 </td><td class="highlighted"  colspan=1 rowspan=1 > 30.03% 11,179 </td><td colspan=1 rowspan=1 > 53.01% 19,733 </td></tr>
</table>
Question:
How many votes has the AEI gained from the last three Căușeni District elections?
Answer:
During the last three Căușeni District elections, the vote for the AEI has grown from 11,179 votes to 20,140 votes.