Frequencies for first 10,000 rows of caseversion variable in demo2017q2 dataset :

     Safety |
     Report |
    Version |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |      3,878       38.78       38.78
          3 |      2,395       23.95       62.73
          4 |      1,499       14.99       77.72
          5 |        883        8.83       86.55
          6 |        510        5.10       91.65
          7 |        402        4.02       95.67
          8 |        250        2.50       98.17
          9 |        183        1.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 Feb 2018