Frequencies for urgeo variable in impact2002 dataset :

      Large |
     Urban, |
Other Urban |
   or Rural |
Designation |
     of the |
  Providers |
 Geographic |
       CBSA |      Freq.     Percent        Cum.
------------+-----------------------------------
     LURBAN |      1,597       32.69       32.69
     OURBAN |      1,147       23.48       56.16
      RURAL |      2,142       43.84      100.00
------------+-----------------------------------
      Total |      4,886      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016