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 busiest airports by cargo traffic
Table title:
2017 statistics
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Rank </th><th colspan=1 rowspan=1 > Airport </th><th colspan=1 rowspan=1 > Location </th><th colspan=1 rowspan=1 > Code (IATA/ICAO) </th><th colspan=1 rowspan=1 > Rank Change </th><th colspan=1 rowspan=1 > Total Cargo (tonnes) </th><th colspan=1 rowspan=1 > % Change </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1. </td><td class="highlighted"  colspan=1 rowspan=1 > Hong Kong Hong Kong International Airport </td><td colspan=1 rowspan=1 > Chek Lap Kok, Islands, New Territories, Hong Kong </td><td colspan=1 rowspan=1 > HKG/VHHH </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 5,049,898 </td><td colspan=1 rowspan=1 > 9.4% </td></tr>
<tr> <td colspan=1 rowspan=1 > 2. </td><td class="highlighted"  colspan=1 rowspan=1 > United States Memphis International Airport </td><td colspan=1 rowspan=1 > Memphis, Tennessee, United States </td><td colspan=1 rowspan=1 > MEM/KMEM </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 4,336,752 </td><td colspan=1 rowspan=1 > 0.3% </td></tr>
<tr> <td colspan=1 rowspan=1 > 3. </td><td colspan=1 rowspan=1 > China Shanghai Pudong International Airport </td><td colspan=1 rowspan=1 > Pudong, Shanghai, China </td><td colspan=1 rowspan=1 > PVG/ZSPD </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 3,824,280 </td><td colspan=1 rowspan=1 > 11.2% </td></tr>
<tr> <td colspan=1 rowspan=1 > 4. </td><td colspan=1 rowspan=1 > South Korea Incheon International Airport </td><td colspan=1 rowspan=1 > Incheon, Seoul National Capital Area, South Korea </td><td colspan=1 rowspan=1 > ICN/RKSI </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 2,921,691 </td><td colspan=1 rowspan=1 > 7.6% </td></tr>
<tr> <td colspan=1 rowspan=1 > 5. </td><td colspan=1 rowspan=1 > United States Ted Stevens Anchorage International Airport </td><td colspan=1 rowspan=1 > Anchorage, Alaska, United States </td><td colspan=1 rowspan=1 > ANC/PANC </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 2,713,230 </td><td colspan=1 rowspan=1 > 6.7% </td></tr>
<tr> <td colspan=1 rowspan=1 > 6. </td><td colspan=1 rowspan=1 > United Arab Emirates Dubai International Airport </td><td colspan=1 rowspan=1 > Dubai, United Arab Emirates </td><td colspan=1 rowspan=1 > DXB/OMDB </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2,654,494 </td><td colspan=1 rowspan=1 > 2.40% </td></tr>
<tr> <td colspan=1 rowspan=1 > 7. </td><td colspan=1 rowspan=1 > United States Louisville International Airport </td><td colspan=1 rowspan=1 > Louisville, Kentucky, United States </td><td colspan=1 rowspan=1 > SDF/KSDF </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2,602,695 </td><td colspan=1 rowspan=1 > 6.80% </td></tr>
<tr> <td colspan=1 rowspan=1 > 8. </td><td colspan=1 rowspan=1 > Japan Narita International Airport </td><td colspan=1 rowspan=1 > Narita, Chiba, Kantō, Honshū, Japan </td><td colspan=1 rowspan=1 > NRT/RJAA </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 2,336,427 </td><td colspan=1 rowspan=1 > 7.9% </td></tr>
<tr> <td colspan=1 rowspan=1 > 9. </td><td colspan=1 rowspan=1 > Taiwan Taiwan Taoyuan International Airport </td><td colspan=1 rowspan=1 > Dayuan, Taoyuan, Taiwan </td><td colspan=1 rowspan=1 > TPE/RCTP </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 2,269,585 </td><td colspan=1 rowspan=1 > 8.2% </td></tr>
<tr> <td colspan=1 rowspan=1 > 10. </td><td colspan=1 rowspan=1 > France Charles de Gaulle Airport </td><td colspan=1 rowspan=1 > Seine-et-Marne/Seine-Saint-Denis/Val-d'Oise, Île-de-France, France </td><td colspan=1 rowspan=1 > CDG/LFPG </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 2,195,229 </td><td colspan=1 rowspan=1 > 2.8% </td></tr>
</table>
Question:
Which airport was the world's busiest airport by cargo traffic?
Answer:
Hong Kong International Airport has surpassed Memphis International Airport to become the world's busiest airport by cargo traffic.