The number of deaths due to the "Bottom 10" stories is about 50 million. The average life-years lost may be about 30. Thus, the number of characters would be 1.5 billion life-years / 40,000 life-years/character = 40,000 characters. Previous articles on these topics:

Thus, this article could be 40,000-18,000=12,000 characters. Since this article has 4300 characters, there could be more articles on these topics.