Frequencies for first 10,000 rows of i_f_code variable in demo2005q3 dataset :

   Code for |
 initial or |
  follow-up |
  status of |
 report, as |
   reported |      Freq.     Percent        Cum.
------------+-----------------------------------
          F |      3,565       35.65       35.65
          I |      6,434       64.34       99.99
          U |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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