Frequencies for first 10,000 rows of i_f_code variable in demo2006q4 dataset :

   Code for |
 initial or |
  follow-up |
  status of |
 report, as |
   reported |      Freq.     Percent        Cum.
------------+-----------------------------------
          F |      3,520       35.20       35.20
          I |      6,480       64.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015