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:
French Guiana
Table title:
Economy
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 >  </th><th colspan=1 rowspan=1 > 2015 </th><th colspan=1 rowspan=1 > 2016 </th><th colspan=1 rowspan=1 > 2017 </th></tr>
<tr> <td colspan=1 rowspan=1 > Nominal GDP (€ bn) </td><td colspan=1 rowspan=1 > 4.44 </td><td colspan=1 rowspan=1 > 4.69 </td><td colspan=1 rowspan=1 > 4.59 </td></tr>
<tr> <td colspan=1 rowspan=1 > GDP per capita (euros) </td><td colspan=1 rowspan=1 > 16,784 </td><td colspan=1 rowspan=1 > 17,139 </td><td class="highlighted"  colspan=1 rowspan=1 > 16,218 </td></tr>
<tr> <td colspan=1 rowspan=1 > GDP per capita as a % of Metropolitan France's </td><td colspan=1 rowspan=1 > 50.2 </td><td colspan=1 rowspan=1 > 50.7 </td><td class="highlighted"  colspan=1 rowspan=1 > 46.7 </td></tr>
<tr> <td colspan=4 rowspan=1 > Sources: Eurostat; INSEE for the population. </td></tr>
</table>
Question:
How's French Guiana's GDP compare to that of metropolitan France in 2017?
Answer:
In 2017, the GDP per capita of French Guiana was €16,218, but that only represented 46.7% of metropolitan France's average GDP per capita that year.