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:
1961 West German federal election
Table title:
Results
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=2 > Parties </th><th colspan=5 rowspan=1 > Constituency </th><th colspan=5 rowspan=1 > Party list </th><th colspan=5 rowspan=1 > Total seats </th></tr>
<tr> <th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th><th colspan=1 rowspan=1 > +/− </th><th colspan=1 rowspan=1 > Seats </th><th colspan=1 rowspan=1 > +/− </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th><th colspan=1 rowspan=1 > +/− </th><th colspan=1 rowspan=1 > Seats </th><th colspan=1 rowspan=1 > +/− </th><th colspan=1 rowspan=1 > Seats </th><th colspan=1 rowspan=1 > +/− </th><th colspan=1 rowspan=1 > % </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > Social Democratic Party (SPD) </td><td colspan=1 rowspan=1 > 11,672,057 </td><td colspan=1 rowspan=1 > 36.5 </td><td colspan=1 rowspan=1 > +4.5 </td><td colspan=1 rowspan=1 > 91 </td><td colspan=1 rowspan=1 > +45 </td><td colspan=1 rowspan=1 > 11,427,355 </td><td colspan=1 rowspan=1 > 36.2 </td><td colspan=1 rowspan=1 > +4.4 </td><td colspan=1 rowspan=1 > 99 </td><td colspan=1 rowspan=1 > −24 </td><td class="highlighted"  colspan=1 rowspan=1 > 203 </td><td colspan=1 rowspan=1 > +22 </td><td colspan=1 rowspan=1 > 39.0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Christian Democratic Union (CDU) </td><td colspan=1 rowspan=1 > 11,622,995 </td><td colspan=1 rowspan=1 > 36.3 </td><td colspan=1 rowspan=1 > −3.4 </td><td colspan=1 rowspan=1 > 114 </td><td colspan=1 rowspan=1 > −33 </td><td colspan=1 rowspan=1 > 11,283,901 </td><td colspan=1 rowspan=1 > 35.8 </td><td colspan=1 rowspan=1 > −3.9 </td><td colspan=1 rowspan=1 > 78 </td><td colspan=1 rowspan=1 > +10 </td><td colspan=1 rowspan=1 > 201 </td><td colspan=1 rowspan=1 > −21 </td><td colspan=1 rowspan=1 > 38.6 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Free Democratic Party (FDP) </td><td colspan=1 rowspan=1 > 3,866,269 </td><td colspan=1 rowspan=1 > 12.1 </td><td colspan=1 rowspan=1 > +4.6 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > −1 </td><td colspan=1 rowspan=1 > 4,028,766 </td><td colspan=1 rowspan=1 > 12.8 </td><td colspan=1 rowspan=1 > +5.1 </td><td colspan=1 rowspan=1 > 67 </td><td colspan=1 rowspan=1 > +27 </td><td colspan=1 rowspan=1 > 67 </td><td colspan=1 rowspan=1 > +23 </td><td colspan=1 rowspan=1 > 12.9 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Christian Social Union (CSU) </td><td colspan=1 rowspan=1 > 3,104,742 </td><td colspan=1 rowspan=1 > 9.7 </td><td colspan=1 rowspan=1 > −0.9 </td><td colspan=1 rowspan=1 > 42 </td><td colspan=1 rowspan=1 > −5 </td><td colspan=1 rowspan=1 > 3,014,471 </td><td colspan=1 rowspan=1 > 9.6 </td><td colspan=1 rowspan=1 > −0.9 </td><td colspan=1 rowspan=1 > 8 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 50 </td><td colspan=1 rowspan=1 > −5 </td><td colspan=1 rowspan=1 > 9.6 </td></tr>
<tr> <td colspan=15 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > All-German Party (GDP) </td><td colspan=1 rowspan=1 > 859,290 </td><td colspan=1 rowspan=1 > 2.7 </td><td colspan=1 rowspan=1 > −5.2 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > −6 </td><td colspan=1 rowspan=1 > 870,756 </td><td colspan=1 rowspan=1 > 2.8 </td><td colspan=1 rowspan=1 > −5.2 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > −11 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > −17 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > German Peace Union (DFU) </td><td colspan=1 rowspan=1 > 587,488 </td><td colspan=1 rowspan=1 > 1.8 </td><td colspan=1 rowspan=1 > +1.8 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 609,918 </td><td colspan=1 rowspan=1 > 1.9 </td><td colspan=1 rowspan=1 > +1.9 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > German Reich Party (DRP) </td><td colspan=1 rowspan=1 > 242,649 </td><td colspan=1 rowspan=1 > 0.8 </td><td colspan=1 rowspan=1 > −0.2 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 262,977 </td><td colspan=1 rowspan=1 > 0.8 </td><td colspan=1 rowspan=1 > −0.2 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > South Schleswig Voter Federation (SSW) </td><td colspan=1 rowspan=1 > 24,951 </td><td colspan=1 rowspan=1 > 0.1 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 25,449 </td><td colspan=1 rowspan=1 > 0.1 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > German Community (DG) </td><td colspan=1 rowspan=1 > 21,083 </td><td colspan=1 rowspan=1 > 0.1 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 27,308 </td><td colspan=1 rowspan=1 > 0.1 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Electoral Group for a Neutral Germany (WGnD) </td><td colspan=1 rowspan=1 > 778 </td><td colspan=1 rowspan=1 > 0.0 </td><td colspan=1 rowspan=1 > +0.0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Electoral groups and independents </td><td colspan=1 rowspan=1 > 2,164 </td><td colspan=1 rowspan=1 > 0.0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=2 rowspan=1 > Invalid/blank votes </td><td colspan=1 rowspan=1 > 845,158 </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 1,298,723 </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td></tr>
<tr> <th colspan=2 rowspan=1 > Totals </th><td colspan=1 rowspan=1 > 32,849,624 </td><td colspan=1 rowspan=1 > 100 </td><td colspan=1 rowspan=1 > ±0.0 </td><td colspan=1 rowspan=1 > 247 </td><td colspan=1 rowspan=1 > ±0 </td><td colspan=1 rowspan=1 > 32,849,624 </td><td colspan=1 rowspan=1 > 100 </td><td colspan=1 rowspan=1 > ±0.0 </td><td colspan=1 rowspan=1 > 252 </td><td colspan=1 rowspan=1 > +2 </td><td class="highlighted"  colspan=1 rowspan=1 > 521 </td><td colspan=1 rowspan=1 > +2 </td><td colspan=1 rowspan=1 > ±0 </td></tr>
<tr> <td colspan=2 rowspan=1 > Registered voters/turnout </td><td colspan=1 rowspan=1 > 37,440,715 </td><td colspan=1 rowspan=1 > 87.7 </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 37,440,715 </td><td colspan=1 rowspan=1 > 87.7 </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > — </td></tr>
<tr> <td colspan=15 rowspan=1 > Source: Federal Returning Officer </td></tr>
</table>
Question:
Who won  won 203 of the 521 seats in the 1961 West German federal election?
Answer:
The Social Democratic Party won 203 of the 521 seats.