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:
1990 Banquet Frozen Foods 300
Table title:
Standings after the race
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Pos </th><th colspan=1 rowspan=1 > Driver </th><th colspan=1 rowspan=1 > Points </th><th colspan=1 rowspan=1 > Differential </th></tr>
<tr> <th colspan=1 rowspan=1 > 1 </th><td class="highlighted"  colspan=1 rowspan=1 > Mark Martin </td><td colspan=1 rowspan=1 > 1800 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <th colspan=1 rowspan=1 > 2 </th><td colspan=1 rowspan=1 > Morgan Shepherd </td><td colspan=1 rowspan=1 > 1738 </td><td colspan=1 rowspan=1 > 62 </td></tr>
<tr> <th colspan=1 rowspan=1 > 3 </th><td colspan=1 rowspan=1 > Rusty Wallace </td><td colspan=1 rowspan=1 > 1688 </td><td colspan=1 rowspan=1 > 112 </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 4 </th><td class="highlighted"  colspan=1 rowspan=1 > Dale Earnhardt </td><td colspan=1 rowspan=1 > 1664 </td><td colspan=1 rowspan=1 > 136 </td></tr>
<tr> <th colspan=1 rowspan=1 > - </th><td colspan=1 rowspan=1 > Geoffrey Bodine </td><td colspan=1 rowspan=1 > 1644 </td><td colspan=1 rowspan=1 > 156 </td></tr>
<tr> <th colspan=1 rowspan=1 > - </th><td colspan=1 rowspan=1 > Kyle Petty </td><td colspan=1 rowspan=1 > 1594 </td><td colspan=1 rowspan=1 > 206 </td></tr>
<tr> <th colspan=1 rowspan=1 > 7 </th><td colspan=1 rowspan=1 > Ken Schrader </td><td colspan=1 rowspan=1 > 1555 </td><td colspan=1 rowspan=1 > 245 </td></tr>
<tr> <th colspan=1 rowspan=1 > - </th><td colspan=1 rowspan=1 > Bill Elliott </td><td colspan=1 rowspan=1 > 1546 </td><td colspan=1 rowspan=1 > 254 </td></tr>
<tr> <th colspan=1 rowspan=1 > 9 </th><td colspan=1 rowspan=1 > Darrell Waltrip </td><td colspan=1 rowspan=1 > 1517 </td><td colspan=1 rowspan=1 > 283 </td></tr>
<tr> <th colspan=1 rowspan=1 > - </th><td colspan=1 rowspan=1 > Ernie Irvan </td><td colspan=1 rowspan=1 > 1504 </td><td colspan=1 rowspan=1 > 296 </td></tr>
</table>
Question:
How much did Mark Martin beat Dale Earnhardt by?
Answer:
After this race, Mark Martin had a 136-point lead over Dale Earnhardt who was 4th in points after this race.