text: https://www.forbes.com/sites/niallmccarthy/2016/11/25/the-u-s-cities-where-the-largest-homeless-pop-infographic/#2ddd98f14dde
  
  http://m.ranker.com/list/top-10-u-s-cities-with-a-high-homelessness-rate/greg
  
  https://www.acsh.org/news/2016/10/13/which-cities-have-most-homeless-people-10300
  
  https://www.citylab.com/equity/2012/03/homelessness-us-cities/1352/