Frequencies for first 10,000 rows of versionnum variable in bencs2016 dataset :

    Version |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        180        1.80        1.80
          2 |        207        2.07        3.87
          3 |        378        3.78        7.65
          4 |        135        1.35        9.00
          6 |      7,848       78.48       87.48
          8 |      1,220       12.20       99.68
         10 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 6 Oct 2016