How do I set the table cell widths to minimum except last column?

table {
  border: 1px solid green;
  border-collapse: collapse;
  width: 100%;
}

table td {
  border: 1px solid green;
}

table td.shrink {
  white-space: nowrap
}

table td.expand {
  width: 99%
}

<table>
  <tr>
    <td class="shrink">element1</td>
    <td class="shrink">data</td>
    <td class="shrink">junk here</td>
    <td class="expand">last column</td>
  </tr>
  <tr>
    <td class="shrink">elem</td>
    <td class="shrink">more data</td>
    <td class="shrink">other stuff</td>
    <td class="expand">again, last column</td>
  </tr>
  <tr>
    <td class="shrink">more</td>
    <td class="shrink">of </td>
    <td class="shrink">these</td>
    <td class="expand">rows</td>
  </tr>
</table>