You can apply formatting to the cells for numbers, text, dates, etc.
See my previous answer on this: HTML to Excel: How can tell Excel to treat columns as numbers?
(adjusted snippet)
If you add a CSS Class to your page:
.num {
mso-number-format:General;
}
.text{
mso-number-format:"@";/*force text*/
}
And slap those classes on your TD's, does it work?
<td class="num">34</td>
<td class="num">17.0</td>
<td class="text">067</td>
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