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:
British Americans
Table title:
Number of British Americans
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Ancestral origin </th><th colspan=1 rowspan=1 > Number </th><th colspan=1 rowspan=1 > % of population </th></tr>
<tr> <td colspan=2 rowspan=1 > British; totals </td><td colspan=1 rowspan=1 > 61,327,867 </td><td colspan=1 rowspan=1 > 31.67% </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=4 > 1980 </td><td colspan=1 rowspan=1 > English </td><td colspan=1 rowspan=1 > 49,598,035 </td><td colspan=1 rowspan=1 > 26.34% </td></tr>
<tr> <td colspan=1 rowspan=1 > Scottish </td><td colspan=1 rowspan=1 > 10,048,816 </td><td colspan=1 rowspan=1 > 4.44% </td></tr>
<tr> <td colspan=1 rowspan=1 > Welsh </td><td colspan=1 rowspan=1 > 1,664,598 </td><td colspan=1 rowspan=1 > 0.88% </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Northern Irelander </td><td class="highlighted"  colspan=1 rowspan=1 > 16,418 </td><td colspan=1 rowspan=1 > 0.01% </td></tr>
<tr> <td colspan=2 rowspan=1 > Total </td><td colspan=1 rowspan=1 > 46,816,175 </td><td colspan=1 rowspan=1 > 18.8% </td></tr>
<tr> <td colspan=1 rowspan=5 > 1990 </td><td colspan=1 rowspan=1 > English </td><td colspan=1 rowspan=1 > 32,651,788 </td><td colspan=1 rowspan=1 > 13.1% </td></tr>
<tr> <td colspan=1 rowspan=1 > Scottish </td><td colspan=1 rowspan=1 > 5,393,581 </td><td colspan=1 rowspan=1 > 2.2% </td></tr>
<tr> <td colspan=1 rowspan=1 > Scotch-Irish </td><td colspan=1 rowspan=1 > 5,617,773 </td><td colspan=1 rowspan=1 > 2.3% </td></tr>
<tr> <td colspan=1 rowspan=1 > Welsh </td><td colspan=1 rowspan=1 > 2,033,893 </td><td colspan=1 rowspan=1 > 0.8% </td></tr>
<tr> <td colspan=1 rowspan=1 > British </td><td colspan=1 rowspan=1 > 1,119,140 </td><td colspan=1 rowspan=1 > 0.4% </td></tr>
<tr> <td colspan=2 rowspan=1 > Total </td><td colspan=1 rowspan=1 > 36,564,465 </td><td colspan=1 rowspan=1 > 12.9% </td></tr>
<tr> <td colspan=1 rowspan=5 > 2000 </td><td colspan=1 rowspan=1 > English </td><td colspan=1 rowspan=1 > 24,515,138 </td><td colspan=1 rowspan=1 > 8.7% </td></tr>
<tr> <td colspan=1 rowspan=1 > Scottish </td><td colspan=1 rowspan=1 > 4,890,581 </td><td colspan=1 rowspan=1 > 1.7% </td></tr>
<tr> <td colspan=1 rowspan=1 > Scotch-Irish </td><td colspan=1 rowspan=1 > 4,319,232 </td><td colspan=1 rowspan=1 > 1.5% </td></tr>
<tr> <td colspan=1 rowspan=1 > Welsh </td><td colspan=1 rowspan=1 > 1,753,794 </td><td colspan=1 rowspan=1 > 0.6% </td></tr>
<tr> <td colspan=1 rowspan=1 > British </td><td colspan=1 rowspan=1 > 1,085,720 </td><td colspan=1 rowspan=1 > 0.4% </td></tr>
<tr> <td colspan=2 rowspan=1 > Total </td><td colspan=1 rowspan=1 > 37,619,881 </td><td colspan=1 rowspan=1 > 14.4% </td></tr>
<tr> <td colspan=1 rowspan=5 > 2010 </td><td colspan=1 rowspan=1 > English </td><td colspan=1 rowspan=1 > 25,927,345 </td><td colspan=1 rowspan=1 > 8.4% </td></tr>
<tr> <td colspan=1 rowspan=1 > Scottish </td><td colspan=1 rowspan=1 > 5,460,679 </td><td colspan=1 rowspan=1 > 3.1% </td></tr>
<tr> <td colspan=1 rowspan=1 > Scotch-Irish </td><td colspan=1 rowspan=1 > 3,257,161 </td><td colspan=1 rowspan=1 > 1.9% </td></tr>
<tr> <td colspan=1 rowspan=1 > Welsh </td><td colspan=1 rowspan=1 > 1,793,356 </td><td colspan=1 rowspan=1 > 0.6% </td></tr>
<tr> <td colspan=1 rowspan=1 > British </td><td colspan=1 rowspan=1 > 1,181,340 </td><td colspan=1 rowspan=1 > 0.4% </td></tr>
<tr> <td colspan=4 rowspan=1 > Source:United States Census Bureau. </td></tr>
</table>
Question:
What year did some Americans report as Northern Islander, and how many reported as this category?
Answer:
In 1980 16,418 Americans reported ‘Northern Islander’.