this is a powerful graph. so I assume it's subtlety wrong somehow.https://twitter.com/dylanwiliam/status/785303667305963523 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
how is b) something that differentiates from other countries?
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.