Frequencies for first 10,000 rows of regionoff variable in namcs2012 dataset :

     Region |
      where |
majority of |
physician's |
    sampled |
     visits |
   occurred |      Freq.     Percent        Cum.
------------+-----------------------------------
  Northeast |      1,579       15.79       15.79
    Midwest |      1,971       19.71       35.50
      South |      4,237       42.37       77.87
       West |      2,213       22.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016