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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         78        0.78        0.78
          1 |        244        2.44        3.22
          2 |        105        1.05        4.27
          3 |         84        0.84        5.11
          4 |         89        0.89        6.00
          5 |         90        0.90        6.90
          6 |         56        0.56        7.46
          7 |        116        1.16        8.62
          8 |         37        0.37        8.99
          9 |        431        4.31       13.30
          A |        752        7.52       20.82
          B |        821        8.21       29.03
          C |      1,059       10.59       39.62
          D |        615        6.15       45.77
          E |        826        8.26       54.03
          F |        541        5.41       59.44
          G |        463        4.63       64.07
          H |        523        5.23       69.30
          J |        274        2.74       72.04
          K |        136        1.36       73.40
          L |        416        4.16       77.56
          M |        144        1.44       79.00
          N |        214        2.14       81.14
          P |        313        3.13       84.27
          Q |          1        0.01       84.28
          R |        343        3.43       87.71
          S |        317        3.17       90.88
          T |         45        0.45       91.33
          U |         62        0.62       91.95
          V |        151        1.51       93.46
          W |        238        2.38       95.84
          X |         88        0.88       96.72
          Y |        210        2.10       98.82
          Z |        118        1.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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