Frequencies for first 10,000 rows of vin_6 variable in vehicle dataset :

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.03        0.03
          0 |        355        3.55        3.58
          1 |      2,601       26.01       29.59
          2 |      1,286       12.86       42.45
          3 |        863        8.63       51.08
          4 |        734        7.34       58.42
          5 |      1,379       13.79       72.21
          6 |        548        5.48       77.69
          7 |        409        4.09       81.78
          8 |        328        3.28       85.06
          9 |        621        6.21       91.27
          A |        144        1.44       92.71
          B |        160        1.60       94.31
          C |         55        0.55       94.86
          D |         58        0.58       95.44
          E |         34        0.34       95.78
          F |         15        0.15       95.93
          G |         24        0.24       96.17
          H |         50        0.50       96.67
          J |         24        0.24       96.91
          K |         11        0.11       97.02
          L |         17        0.17       97.19
          M |         42        0.42       97.61
          N |          1        0.01       97.62
          O |          1        0.01       97.63
          P |         12        0.12       97.75
          Q |          2        0.02       97.77
          R |         37        0.37       98.14
          S |         51        0.51       98.65
          T |         20        0.20       98.85
          U |         26        0.26       99.11
          V |          7        0.07       99.18
          W |         20        0.20       99.38
          X |         17        0.17       99.55
          Y |          9        0.09       99.64
          Z |         36        0.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016