Frequencies for first 10,000 rows of foll_seq variable in demo2008q3 dataset :

        The |
   sequence |
number of a |
   followup |
     report |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,583       95.83       95.83
          1 |        279        2.79       98.62
          2 |         90        0.90       99.52
          3 |         24        0.24       99.76
          4 |         15        0.15       99.91
         41 |          1        0.01       99.92
          5 |          3        0.03       99.95
          6 |          1        0.01       99.96
          7 |          2        0.02       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