Frequencies for first 10,000 rows of foll_seq variable in demo2010q2 dataset :

        The |
   sequence |
number of a |
   followup |
     report |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,760       97.60       97.60
         #1 |          1        0.01       97.61
          1 |        142        1.42       99.03
         12 |          1        0.01       99.04
         15 |          1        0.01       99.05
          2 |         48        0.48       99.53
          3 |         25        0.25       99.78
          4 |         10        0.10       99.88
          5 |          4        0.04       99.92
          6 |          7        0.07       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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