Frequencies for insr_ndx variable in fmli011 dataset :

   insr_ndx |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      7,617       98.77       98.77
          B |          6        0.08       98.85
          C |         16        0.21       99.05
          D |         73        0.95      100.00
------------+-----------------------------------
      Total |      7,712      100.00

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