Frequencies for irabx_ variable in fmli132 dataset :

     irabx_ |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      6,154       91.01       91.01
          B |        412        6.09       97.10
          D |        196        2.90      100.00
------------+-----------------------------------
      Total |      6,762      100.00

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