Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        712        7.12        7.12
          1 |      1,358       13.58       20.70
          2 |      1,223       12.23       32.93
          3 |      1,039       10.39       43.32
          4 |        588        5.88       49.20
          5 |        677        6.77       55.97
          6 |        417        4.17       60.14
          7 |      1,183       11.83       71.97
          8 |        433        4.33       76.30
          9 |      1,148       11.48       87.78
          A |        191        1.91       89.69
          B |        171        1.71       91.40
          C |         91        0.91       92.31
          D |         37        0.37       92.68
          E |         21        0.21       92.89
          F |         35        0.35       93.24
          G |        110        1.10       94.34
          H |        128        1.28       95.62
          J |         56        0.56       96.18
          K |          6        0.06       96.24
          L |         70        0.70       96.94
          M |         20        0.20       97.14
          N |          2        0.02       97.16
          P |          5        0.05       97.21
          Q |          2        0.02       97.23
          R |         10        0.10       97.33
          S |         55        0.55       97.88
          T |         23        0.23       98.11
          U |          8        0.08       98.19
          V |          7        0.07       98.26
          W |          5        0.05       98.31
          Y |        160        1.60       99.91
          Z |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016