Frequencies for first 10,000 rows of foll_seq variable in demo2007q2 dataset :

        The |
   sequence |
number of a |
   followup |
     report |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,537       95.37       95.37
          1 |        330        3.30       98.67
          2 |         96        0.96       99.63
          3 |         25        0.25       99.88
          4 |          6        0.06       99.94
          5 |          4        0.04       99.98
          7 |          1        0.01       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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