Enhancement: Summarise statistics for the EU/EEA

### Impacted plugin

Jetpack

### What

I would like to have a line in statistics report that sums up all users from EU/EEA

### How

The statistics summary is placing oversized importance on the visitors from the USA.

Because the European Union is split up into individual countries in the stats page, the totals for each country are low compared to the total from the USA. On the other hand, if I sum up the results from the individual countries I get good 10-20% more from EU/EEA than from USA; but that’s not obvious from either the map or the graph below.

Please either add EU or EEA as a separate line, or an option to add all the EU countries together, and show it as a single area/line.

While my website targets global audience, I’m pretty sure there are a lot of local businesses that because of stuff like customs duties will want to be able to gauge their audience within EU.

Start by locating the Jetpack statistics report implementation and the code that displays the country breakdown. Review how country totals are presented, then make the EU/EEA available as a combined line or selectable area; done means the aggregate is visible alongside the existing country statistics.

Written by the indexing model from the issue text.