I could point out the numerous issues with those 2 studies, or you could just accept that your 20% figure is incorrect.
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
I could point out the numerous issues with those 2 studies, or you could just accept that your 20% figure is incorrect.