Frequencies for urgeo variable in impact2014 dataset :

      Large |
     Urban, |
Other Urban |
   or Rural |
Designation |
     of the |
  Providers |
 Geographic |
       CBSA |      Freq.     Percent        Cum.
------------+-----------------------------------
     LURBAN |      1,406       40.37       40.37
     OURBAN |      1,127       32.36       72.72
      RURAL |        950       27.28      100.00
------------+-----------------------------------
      Total |      3,483      100.00

by Jean Roth , jroth@nber.org , 16 Dec 2016