Frequencies for first 10,000 rows of versionnum variable in servarea2015 dataset :

    Version |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        121        1.21        1.21
          2 |        342        3.42        4.63
          3 |        412        4.12        8.75
          4 |      1,175       11.75       20.50
          5 |        974        9.74       30.24
          6 |      1,589       15.89       46.13
          7 |      1,053       10.53       56.66
          8 |      1,021       10.21       66.87
          9 |        937        9.37       76.24
         10 |        615        6.15       82.39
         11 |        371        3.71       86.10
         12 |        116        1.16       87.26
         13 |        144        1.44       88.70
         14 |        258        2.58       91.28
         15 |         58        0.58       91.86
         16 |        214        2.14       94.00
         17 |          3        0.03       94.03
         18 |         55        0.55       94.58
         19 |        286        2.86       97.44
         20 |        256        2.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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