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:
List of islands of New Zealand
Table title:
Listed by size
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Rank </th><th colspan=1 rowspan=1 > English name </th><th colspan=1 rowspan=1 > Māori name </th><th colspan=1 rowspan=1 > km2 </th><th colspan=1 rowspan=1 > % of NZ Area </th><th colspan=1 rowspan=1 > Population </th></tr>
<tr> <td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > South Island </td><td colspan=1 rowspan=1 > Te Waipounamu, Te Wahi Pounamu, Te Waka-a-Māui, Te Waka o Aoraki </td><td colspan=1 rowspan=1 > 151,215 </td><td colspan=1 rowspan=1 > 56.2% </td><td colspan=1 rowspan=1 > 1,135,500 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > North Island </td><td colspan=1 rowspan=1 > Te Ika-a-Māui </td><td colspan=1 rowspan=1 > 113,729 </td><td colspan=1 rowspan=1 > 42.3% </td><td colspan=1 rowspan=1 > 3,749,200 </td></tr>
<tr> <td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > Stewart Island </td><td colspan=1 rowspan=1 > Rakiura, Te Punga o Te Waka-a-Māui </td><td colspan=1 rowspan=1 > 1,683 </td><td colspan=1 rowspan=1 > 0.6% </td><td colspan=1 rowspan=1 > 400 </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > Chatham Island </td><td colspan=1 rowspan=1 > Rekohu (Moriori); Wharekauri (Māori) </td><td colspan=1 rowspan=1 > 900 </td><td colspan=1 rowspan=1 > 0.3% </td><td colspan=1 rowspan=1 > 600 </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > Auckland Island </td><td colspan=1 rowspan=1 > Motu Maha </td><td colspan=1 rowspan=1 > 510 </td><td colspan=1 rowspan=1 > 0.2% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 6 </td><td class="highlighted"  colspan=1 rowspan=1 > Great Barrier Island </td><td colspan=1 rowspan=1 > Aotea </td><td class="highlighted"  colspan=1 rowspan=1 > 285 </td><td colspan=1 rowspan=1 > 0.1% </td><td colspan=1 rowspan=1 > 850 </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > Resolution Island </td><td colspan=1 rowspan=1 > Taumoana </td><td colspan=1 rowspan=1 > 208.87 </td><td colspan=1 rowspan=1 > 0.1% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 8 </td><td colspan=1 rowspan=1 > D'Urville Island </td><td colspan=1 rowspan=1 > Rangitoto Ki Te Tonga </td><td colspan=1 rowspan=1 > 150 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > About 52 </td></tr>
<tr> <td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 > Campbell Island </td><td colspan=1 rowspan=1 > Motu Ihupuku </td><td colspan=1 rowspan=1 > 115 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 > Adams Island </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 100 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 11 </td><td colspan=1 rowspan=1 > Waiheke Island </td><td colspan=1 rowspan=1 > Waiheke </td><td colspan=1 rowspan=1 > 92 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > 9,770 </td></tr>
<tr> <td colspan=1 rowspan=1 > 12 </td><td colspan=1 rowspan=1 > Secretary Island </td><td colspan=1 rowspan=1 > Rangitoa </td><td colspan=1 rowspan=1 > 81.4 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > Arapaoa Island </td><td colspan=1 rowspan=1 > Arapaoa </td><td colspan=1 rowspan=1 > 75 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > 50 </td></tr>
<tr> <td colspan=1 rowspan=1 > 14 </td><td colspan=1 rowspan=1 > Pitt Island </td><td colspan=1 rowspan=1 > Rangiaotea (Moriori) or Rangiauria (Maori) </td><td colspan=1 rowspan=1 > 62 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > 38 </td></tr>
<tr> <td colspan=1 rowspan=1 > 15 </td><td colspan=1 rowspan=1 > Matakana Island </td><td colspan=1 rowspan=1 > Matakana </td><td colspan=1 rowspan=1 > 60 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > 225 </td></tr>
<tr> <td colspan=1 rowspan=1 > 16 </td><td colspan=1 rowspan=1 > Raoul Island </td><td colspan=1 rowspan=1 > Rangitahua </td><td colspan=1 rowspan=1 > 29.4 </td><td colspan=1 rowspan=1 > <0.1% </td><td colspan=1 rowspan=1 > 6 </td></tr>
<tr> <td colspan=1 rowspan=1 > 17 </td><td colspan=1 rowspan=1 > Little Barrier Island </td><td colspan=1 rowspan=1 > Hauturu </td><td colspan=1 rowspan=1 > 28 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 18 </td><td colspan=1 rowspan=1 > Rangitoto Island </td><td colspan=1 rowspan=1 > Rangitoto </td><td colspan=1 rowspan=1 > 23.1 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 19 </td><td colspan=1 rowspan=1 > Antipodes Island </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 20 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 20 </td><td colspan=1 rowspan=1 > Kapiti Island </td><td colspan=1 rowspan=1 > Kapiti </td><td colspan=1 rowspan=1 > 19.7 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 21 </td><td colspan=1 rowspan=1 > Kawau Island </td><td colspan=1 rowspan=1 > Kawau </td><td colspan=1 rowspan=1 > 19 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 81 </td></tr>
<tr> <td colspan=1 rowspan=1 > 22 </td><td colspan=1 rowspan=1 > Long Island, Southland </td><td colspan=1 rowspan=1 > Motu Roa </td><td colspan=1 rowspan=1 > 18.99 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 23 </td><td colspan=1 rowspan=1 > Cooper Island </td><td colspan=1 rowspan=1 > Ure Toto </td><td colspan=1 rowspan=1 > 17.79 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 24 </td><td colspan=1 rowspan=1 > Ponui Island </td><td colspan=1 rowspan=1 > Ponui </td><td colspan=1 rowspan=1 > 17.7 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 25 </td><td colspan=1 rowspan=1 > Great Mercury Island </td><td colspan=1 rowspan=1 > Ahuahu </td><td colspan=1 rowspan=1 > 17.2 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 26 </td><td colspan=1 rowspan=1 > Ruapuke Island </td><td colspan=1 rowspan=1 > Ruapuke </td><td colspan=1 rowspan=1 > 16 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 27 </td><td colspan=1 rowspan=1 > Motutapu Island </td><td colspan=1 rowspan=1 > Motutapu </td><td colspan=1 rowspan=1 > 15.1 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 </td><td colspan=1 rowspan=1 > Codfish Island </td><td colspan=1 rowspan=1 > Whenua Hou </td><td colspan=1 rowspan=1 > 14 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 29 </td><td colspan=1 rowspan=1 > Mayor Island </td><td colspan=1 rowspan=1 > Tuhua </td><td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 30 </td><td colspan=1 rowspan=1 > Coal Island </td><td colspan=1 rowspan=1 > Te Puka-Hereka </td><td colspan=1 rowspan=1 > 11.6 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 31 </td><td colspan=1 rowspan=1 > Anchor Island </td><td colspan=1 rowspan=1 > Puke Nui </td><td colspan=1 rowspan=1 > 11.37 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 32 </td><td colspan=1 rowspan=1 > Motiti Island </td><td colspan=1 rowspan=1 > Motiti </td><td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 27 </td></tr>
<tr> <td colspan=1 rowspan=1 > 33 </td><td colspan=1 rowspan=1 > Big South Cape Island </td><td colspan=1 rowspan=1 > Taukihepa </td><td colspan=1 rowspan=1 > 9.4 </td><td colspan=1 rowspan=1 > ~0.0% </td><td colspan=1 rowspan=1 > 0 </td></tr>
</table>
Question:
How large is Great Barrier Island?
Answer:
Great Barrier Island is the sixth-largest island with an area of 285 square kilometres, or 0.1% of New Zealand area.