Frequencies for first 10,000 rows of caseversion variable in demo2016q4 dataset :

     Safety |
     Report |
    Version |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.01        0.01
          2 |      3,750       37.50       37.51
          3 |      2,253       22.53       60.04
          4 |      1,434       14.34       74.38
          5 |        962        9.62       84.00
          6 |        660        6.60       90.60
          7 |        435        4.35       94.95
          8 |        304        3.04       97.99
          9 |        201        2.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Sep 2017