Frequencies for urspa variable in impact2004 dataset :

   Urban or |
      Rural |
designation |
   based on |
    payment |
       CBSA |      Freq.     Percent        Cum.
------------+-----------------------------------
     LURBAN |      1,617       39.09       39.09
     OURBAN |      1,027       24.82       63.91
      RURAL |      1,493       36.09      100.00
------------+-----------------------------------
      Total |      4,137      100.00

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