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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        165        1.65        1.65
          1 |        448        4.48        6.13
          2 |        367        3.67        9.80
          3 |        224        2.24       12.04
          4 |        180        1.80       13.84
          5 |        142        1.42       15.26
          6 |        100        1.00       16.26
          7 |        455        4.55       20.81
          8 |        116        1.16       21.97
          9 |        579        5.79       27.76
          A |        908        9.08       36.84
          B |      1,069       10.69       47.53
          C |        783        7.83       55.36
          D |        398        3.98       59.34
          E |        475        4.75       64.09
          F |        385        3.85       67.94
          G |        349        3.49       71.43
          H |        350        3.50       74.93
          J |        187        1.87       76.80
          K |        120        1.20       78.00
          L |        170        1.70       79.70
          M |        165        1.65       81.35
          N |        220        2.20       83.55
          P |        364        3.64       87.19
          Q |          2        0.02       87.21
          R |        382        3.82       91.03
          S |        258        2.58       93.61
          T |         51        0.51       94.12
          U |         90        0.90       95.02
          V |        101        1.01       96.03
          W |         99        0.99       97.02
          X |         70        0.70       97.72
          Y |        161        1.61       99.33
          Z |         67        0.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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