Frequencies for urspa variable in impact2008 dataset :

   Urban or |
      Rural |
designation |
   based on |
    payment |
       CBSA |      Freq.     Percent        Cum.
------------+-----------------------------------
     LURBAN |      1,460       40.39       40.39
     OURBAN |      1,159       32.06       72.45
      RURAL |        996       27.55      100.00
------------+-----------------------------------
      Total |      3,615      100.00

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