Frequencies for urgeo variable in impact2016 dataset :

      Large |
     Urban, |
Other Urban |
   or Rural |
Designation |
     of the |
  Providers |
 Geographic |
       CBSA |      Freq.     Percent        Cum.
------------+-----------------------------------
     LURBAN |      1,430       41.49       41.49
     OURBAN |      1,155       33.51       74.99
      RURAL |        862       25.01      100.00
------------+-----------------------------------
      Total |      3,447      100.00

by Jean Roth , jroth@nber.org , 30 Aug 2017