anchor.diff:  469,Plano,48,85,6019
   469,Wilmer,48,113,4136
   469,Crandall,48,257,3624
  +469,Venus,48,251,3499
   469,Farmersville,48,85,3466
   469,Lavon,48,85,3140
   469,Ferris,48,139,2620
  +469,Palmer,48,139,2073
  +469,Italy,48,139,1935
   469,Nevada,48,85,1148
   469,Maypearl,48,139,1033
  +469,Prosper,48,85,893
   469,Blue Ridge,48,85,861
   469,Coppell,48,113,822
  +469,Milford,48,139,747
  +469,Scurry,48,257,747
   469,Bardwell,48,139,689
   469,Cedar Hill,48,113,560
  +469,Rosser,48,257,375
   469,Weston,48,85,313
  +469,Flower Mound,48,121,267
   469,Josephine,48,85,109
   469,Seagoville,48,113,25
  -469,Addison,48,113,0
   469,Celina,48,85,0
  -469,Flower Mound,48,121,0
   469,Forreston,48,139,0
  -469,Italy,48,139,0
  -469,Milford,48,139,0
  -469,Palmer,48,139,0
  -469,Prosper,48,85,0
  -469,Rosser,48,257,0
  -469,Scurry,48,257,0
  -469,Venus,48,251,0
   470,Alpharetta,13,121,65799
   470,Marietta,13,67,61048
   470,Gainesville,13,139,40359
  
positive.code: 816,Lawson,29,177,2245
  816,Holden,29,101,2235
  816,Lathrop,29,49,2035
  816,Weatherby,29,63,1993
  816,Weston,29,165,1784
  816,Hamilton,29,25,1708
  816,Garden City,29,37,1629
  
negative.code: 620,Gas,20,1,512
  620,Goessel,20,115,503
  620,Miltonvale,20,191,499
  620,Pierceville,20,55,495
  620,Protection,20,33,485
  620,Argonia,20,191,483
  620,Thayer,20,133,465
  