<table>
<tr><th scope='col'>symbol</th><th scope='col'>Country</th><th scope='col'>Category</th><th scope='col'>Last</th><th scope='col'>Date</th><th scope='col'>Previous</th><th scope='col'>PreviousDate</th><th scope='col'>Frequency</th><th scope='col'>popularity</th><th scope='col'>Start</th><th scope='col'>Unit</th><th scope='col'>Adjustment</th><th scope='col'>URL</th><th scope='col'>lastUpdate</th></tr>
<tr><td>united states</td><td></td><td></td><td>18</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>
</table>