anchor.diff:  31860,"Mankato-North Mankato, MN",B
   31900,"Mansfield, OH",B
   31999,"Not in metropolitan area, NE",B
  -32420,"Mayagez, PR",B
  +32420,"Mayagüez, PR",B
   32580,"McAllen-Edinburg-Mission, TX",B
   32780,"Medford, OR",B
   32820,"Memphis, TN-MS-AR",B
  
positive.code: 3516100,"Carlsbad-Artesia, NM",M
  3517580,"Clovis, NM",M
  3519700,"Deming, NM",M
  3521580,"Espaola, NM",M
  3522140,"Farmington, NM",M
  3523700,"Gallup, NM",M
  3524380,"Grants, NM",M
  
negative.code: 0699999,"Nonmetropolitan, nonmicropolitan",M
  0814500,"Boulder, CO",M
  0814720,"Breckenridge, CO",M
  0815860,"Cañon City, CO",M
  0817820,"Colorado Springs, CO",M
  0818780,"Craig, CO",M
  0819740,"Denver-Aurora-Lakewood, CO",M
  