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:
SER R class
Table title:
Withdrawal
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > R class in service at start of year </th><th colspan=1 rowspan=1 > R1 class in service at start of year </th><th colspan=1 rowspan=1 > Quantity withdrawn </th><th colspan=1 rowspan=1 > Locomotive numbers </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=1 > 1931 </td><td colspan=1 rowspan=1 > 11 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1342 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1932 </td><td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1077 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > 1126, 1152, 1338 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1153 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1937 </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1125 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1939 </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1155 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1941 </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1336 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1942 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1070 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1943 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1124 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1949 </td><td colspan=1 rowspan=1 > 0 </td><td class="highlighted"  colspan=1 rowspan=1 > 13 </td><td class="highlighted"  colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 1127 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1955 </td><td colspan=1 rowspan=1 > — </td><td class="highlighted"  colspan=1 rowspan=1 > 12 </td><td class="highlighted"  colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 31154, 31335 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1958 </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 31069, 31147 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1959 </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 8 </td><td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > 31010, 31107, 31128, 31174, 31339, 31340 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1960 </td><td colspan=1 rowspan=1 > — </td><td class="highlighted"  colspan=1 rowspan=1 > 2 </td><td class="highlighted"  colspan=1 rowspan=1 > 2 </td><td class="highlighted"  colspan=1 rowspan=1 > 31047, 31337 </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
How many locomotives in the R1 class were withdrawn in the years 1949, 1955, 1959, and 1960?
Answer:
Of the 13 R1 class, one was withdrawn in 1949, two in 1955; after 1959, only nos. 31047 and 31337 were left and these were withdrawn in 1960.