Frequencies for first 10,000 rows of foll_seq variable in demo2009q3 dataset :

        The |
   sequence |
number of a |
   followup |
     report |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,701       97.01       97.01
         #1 |          1        0.01       97.02
         #2 |          1        0.01       97.03
          1 |        200        2.00       99.03
         10 |          2        0.02       99.05
         11 |          1        0.01       99.06
          2 |         52        0.52       99.58
          3 |         20        0.20       99.78
          4 |         10        0.10       99.88
          5 |          6        0.06       99.94
          6 |          3        0.03       99.97
          7 |          2        0.02       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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