1) Create a virtual GPS, choose a name,
2) add the cache (Gcrehx) you want to see by using '+' sign on bottom of screen.
3) In menu 'Statistic' choose 'LogPerDate' and in filter(player) select 'European' as country, leave others param blank
4) In filter(geocache) select you virtual GPS name and leave other param blank
5) you obtain a graphic with peak at this date, hover of this peak to see figure
6) I see 709 when you select country 'European', you may have to choose each continent as this param is required