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:
German submarine U-159 (1941)
Table title:
Summary of raiding history
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Nationality </th><th colspan=1 rowspan=1 > Tonnage (GRT) </th><th colspan=1 rowspan=1 > Fate </th></tr>
<tr> <td colspan=1 rowspan=1 > 21 May 1942 </td><td colspan=1 rowspan=1 > Montenol </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 2,646 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 21 May 1942 </td><td colspan=1 rowspan=1 > New Brunswick </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 6,529 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 2 June 1942 </td><td colspan=1 rowspan=1 > Illinois </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 5,447 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 June 1942 </td><td colspan=1 rowspan=1 > Paracury </td><td colspan=1 rowspan=1 > Brazil </td><td class="highlighted"  colspan=1 rowspan=1 > 265 </td><td class="highlighted"  colspan=1 rowspan=1 > Damaged </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 June 1942 </td><td colspan=1 rowspan=1 > Sally </td><td colspan=1 rowspan=1 > Honduras </td><td class="highlighted"  colspan=1 rowspan=1 > 150 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 June 1942 </td><td colspan=1 rowspan=1 > Edith </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 3,382 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 11 June 1942 </td><td colspan=1 rowspan=1 > Fort Good Hope </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 7,130 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 13 June 1942 </td><td colspan=1 rowspan=1 > Sixaola </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 4,693 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 13 June 1942 </td><td colspan=1 rowspan=1 > Solon Turman </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 6,762 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 18 June 1942 </td><td colspan=1 rowspan=1 > Ante Matkovic </td><td colspan=1 rowspan=1 > Yugoslavia </td><td class="highlighted"  colspan=1 rowspan=1 > 2,710 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 22 June 1942 </td><td colspan=1 rowspan=1 > E.J. Sadler </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 9,639 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 October 1942 </td><td colspan=1 rowspan=1 > Boringia </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 5,821 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 8 October 1942 </td><td colspan=1 rowspan=1 > Clan Mactavish </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 7,631 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 9 October 1942 </td><td colspan=1 rowspan=1 > Coloradan </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 6,557 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 13 October 1942 </td><td colspan=1 rowspan=1 > Empire Nomad </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 7,167 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 29 October 1942 </td><td colspan=1 rowspan=1 > Laplace </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 7,327 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 29 October 1942 </td><td colspan=1 rowspan=1 > Ross </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 4,978 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 November 1942 </td><td colspan=1 rowspan=1 > La Salle </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 5,462 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 13 November 1942 </td><td colspan=1 rowspan=1 > Star of Scotland </td><td colspan=1 rowspan=1 > United States </td><td class="highlighted"  colspan=1 rowspan=1 > 2,290 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 13 November 1942 </td><td colspan=1 rowspan=1 > City of Bombay </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 7,140 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 15 December 1942 </td><td colspan=1 rowspan=1 > Star of Suez </td><td colspan=1 rowspan=1 > Egypt </td><td class="highlighted"  colspan=1 rowspan=1 > 4,999 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 16 December 1942 </td><td colspan=1 rowspan=1 > East Wales </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 4,538 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 March 1943 </td><td colspan=1 rowspan=1 > Silverbeech </td><td colspan=1 rowspan=1 > United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 5,319 </td><td class="highlighted"  colspan=1 rowspan=1 > Sunk </td></tr>
</table>
Question:
How destructive was the German submarine U-159 ?
Answer:
German submarine U-159 sank 22 ships, and damaged another weighing 265 tons.