Table:
Number of shelves	Number of pairs of scissors

1	10

2	20

3	30

4	40

5	?

Read the shown table in this image and give me the reconstructed table in the HTML format, presented as plain text.

<table border="1" cellspacing="0">
<tr> <th> Number of shelves </th> <th> Number of pairs of scissors </th> </tr>
<tr> <td> 1 </td> <td> 10 </td> </tr>
<tr> <td> 2 </td> <td> 20 </td> </tr>
<tr> <td> 3 </td> <td> 30 </td> </tr>
<tr> <td> 4 </td> <td> 40 </td> </tr>
<tr> <td> 5 </td> <td> ? </td> </tr>
</table>