Frequencies for first 10,000 rows of foll_seq variable in demo2011q4 dataset :

        The |
   sequence |
number of a |
   followup |
     report |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        101        1.01        1.01
          2 |         21        0.21        1.22
          3 |         11        0.11        1.33
          4 |          4        0.04        1.37
          5 |          4        0.04        1.41
          6 |          1        0.01        1.42
          7 |          1        0.01        1.43
          9 |          1        0.01        1.44
          . |      9,856       98.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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