Statistics per year

Problem/Motivation

It would be good to have some statistics/per year, to highlight some data.

Proposed resolution

have a backend view, which filters/groups the data with charts

Remaining tasks

create a view and filter to highlight following stats:
Lists:
- Event locations (sorted list)
- Event countries (sorted list) "Most Drupal Events per country"
- Event city (sorted list)

Calculated charts/numbers:
- Event types (Chart and calculated Numbers)
- Event countries (list Top 3) "Top Drupal Event location"
- Top Drupal Countries in Terms of Population (https://en.wikipedia.org/wiki/List_of_countries_and_dependencies_by_popu...) = country inhabitants vs country events (List and Top 3)
- total number of events (number)
- total number of locations (de-duplicate, top 10) "Top event location around the World"