Frequencies for cred_rbx variable in fmli132 dataset :

   cred_rbx |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      6,689       98.92       98.92
          B |         23        0.34       99.26
          D |         50        0.74      100.00
------------+-----------------------------------
      Total |      6,762      100.00

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