Frequencies for first 10,000 rows of versionnum variable in plan2014 dataset :

    Version |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         67        0.67        0.67
          2 |        127        1.27        1.94
          3 |        148        1.48        3.42
          4 |        946        9.46       12.88
          5 |      1,246       12.46       25.34
          6 |      1,876       18.76       44.10
          7 |      1,444       14.44       58.54
          8 |      1,112       11.12       69.66
          9 |      1,638       16.38       86.04
         10 |        439        4.39       90.43
         11 |        450        4.50       94.93
         12 |        281        2.81       97.74
         13 |        126        1.26       99.00
         14 |         40        0.40       99.40
         16 |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 Dec 2017