Frequencies for first 10,000 rows of foll_seq variable in demo2012q1 dataset :

        The |
   sequence |
number of a |
   followup |
     report |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,931       99.31       99.31
          1 |         42        0.42       99.73
         10 |          1        0.01       99.74
          2 |         15        0.15       99.89
          3 |          5        0.05       99.94
          4 |          2        0.02       99.96
          5 |          1        0.01       99.97
          6 |          1        0.01       99.98
          7 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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