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:
Tuxtla Gutiérrez International Airport
Table title:
Traffic statistics
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Passenger Traffic </th><th colspan=1 rowspan=1 > Cargo Traffic (Tons) </th><th colspan=1 rowspan=1 > Aircraft Operations </th></tr>
<tr> <th colspan=1 rowspan=1 > 2006 </th><th colspan=1 rowspan=1 > 334,181 </th><th colspan=1 rowspan=1 > 571 </th><th colspan=1 rowspan=1 > 7,649 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2007 </th><th colspan=1 rowspan=1 > 704,903 </th><th colspan=1 rowspan=1 > 1,312 </th><th colspan=1 rowspan=1 > 13,756 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2008 </th><th colspan=1 rowspan=1 > 788,486 </th><th colspan=1 rowspan=1 > 1,099 </th><th colspan=1 rowspan=1 > 15,862 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2009 </th><th colspan=1 rowspan=1 > 663,479 </th><th colspan=1 rowspan=1 > 1,001 </th><th colspan=1 rowspan=1 > 12,832 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2010 </th><th colspan=1 rowspan=1 > 650,053 </th><th colspan=1 rowspan=1 > 1,081 </th><th colspan=1 rowspan=1 > 12,367 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2011 </th><th colspan=1 rowspan=1 > 803,611 </th><th colspan=1 rowspan=1 > 1,046 </th><th colspan=1 rowspan=1 > 14,182 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2012 </th><th colspan=1 rowspan=1 > 786,829 </th><th colspan=1 rowspan=1 > 1,284 </th><th colspan=1 rowspan=1 > 15,674 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2013 </th><th colspan=1 rowspan=1 > 855,073 </th><th colspan=1 rowspan=1 > 901 </th><th colspan=1 rowspan=1 > 15,930 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2014 </th><th colspan=1 rowspan=1 > 928,243 </th><th colspan=1 rowspan=1 > 1,164 </th><th colspan=1 rowspan=1 > 17,980 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2015 </th><th colspan=1 rowspan=1 > 1,121,332 </th><th colspan=1 rowspan=1 > 1,132 </th><th colspan=1 rowspan=1 > 18,067 </th></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 2016 </th><th colspan=1 rowspan=1 > 1,272,689 </th><th colspan=1 rowspan=1 > 1,236 </th><th colspan=1 rowspan=1 > 19,325 </th></tr>
<tr> <th colspan=1 rowspan=1 > 2017 </th><th colspan=1 rowspan=1 > 1,342,345 </th><th colspan=1 rowspan=1 > 1,346 </th><th colspan=1 rowspan=1 > 20,151 </th></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 2018 </th><th class="highlighted"  colspan=1 rowspan=1 > 1,388,706 </th><th colspan=1 rowspan=1 > 1,287 </th><th colspan=1 rowspan=1 > 17,832 </th></tr>
</table>
Question:
How many passengers did Tuxtla Gutiérrez International airport handle in 2018, an increase on which year?
Answer:
In 2018, Tuxtla Gutiérrez International airport handled 1,388,706 passengers, an increase from 2016.