anchor.diff:  310,El Segundo,6,37,16853
   310,Malibu,6,37,12877
   310,Avalon,6,37,3764
  -310,Marina Del Rey,6,37,0
  +310,Marina del Rey,6,37,0
   312,North Chicago,17,97,8220
   312,Rolling Meadows,17,31,127
   312,Barrington,17,97,0
  
positive.code: 423,Cleveland,47,11,44483
  423,Bristol,47,163,26842
  423,Elizabethton,47,19,13743
  423,Soddy Daisy,47,65,13693
  423,Athens,47,107,13615
  423,Collegedale,47,65,11659
  423,Dayton,47,143,7354
  
negative.code: 850,Crawfordville,12,129,0
  850,Eastpoint,12,37,0
  850,Ebro,12,133,0
  850,Eglin AFB,12,91,0
  850,Gonzalez,12,33,0
  850,Grand Ridge,12,63,0
  850,Greensboro,12,39,0
  