Frequencies for first 10,000 rows of versionnum variable in bencs2015 dataset :

    Version |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |         55        0.55        0.55
          3 |        134        1.34        1.89
          4 |        198        1.98        3.87
          5 |        324        3.24        7.11
          6 |      9,106       91.06       98.17
         10 |        117        1.17       99.34
         11 |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Dec 2017