Frequencies for urspa variable in impact2001 dataset :

   Urban or |
      Rural |
designation |
   based on |
    payment |
       CBSA |      Freq.     Percent        Cum.
------------+-----------------------------------
     LURBAN |      1,703       34.18       34.18
     OURBAN |      1,172       23.52       57.70
      RURAL |      2,108       42.30      100.00
------------+-----------------------------------
      Total |      4,983      100.00

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