Frequencies for first 10,000 rows of foll_seq variable in demo2007q1 dataset :

        The |
   sequence |
number of a |
   followup |
     report |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,435       94.35       94.35
         #2 |          1        0.01       94.36
          1 |        393        3.93       98.29
          2 |        110        1.10       99.39
         28 |          1        0.01       99.40
          3 |         34        0.34       99.74
          4 |         14        0.14       99.88
          5 |          5        0.05       99.93
          6 |          4        0.04       99.97
          7 |          1        0.01       99.98
          8 |          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