Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         27        0.27        0.27
          1 |         89        0.89        1.16
          2 |         39        0.39        1.55
          3 |         30        0.30        1.85
          4 |          9        0.09        1.94
          5 |         22        0.22        2.16
          6 |         15        0.15        2.31
          7 |         23        0.23        2.54
          8 |         24        0.24        2.78
          9 |        375        3.75        6.53
          A |        241        2.41        8.94
          B |        586        5.86       14.80
          C |        211        2.11       16.91
          D |         65        0.65       17.56
          E |         37        0.37       17.93
          F |      1,905       19.05       36.98
          G |      2,259       22.59       59.57
          H |      1,015       10.15       69.72
          J |        201        2.01       71.73
          K |         96        0.96       72.69
          L |        102        1.02       73.71
          M |        432        4.32       78.03
          N |        606        6.06       84.09
          P |        140        1.40       85.49
          Q |          1        0.01       85.50
          R |         18        0.18       85.68
          S |        192        1.92       87.60
          T |        692        6.92       94.52
          U |          2        0.02       94.54
          V |        159        1.59       96.13
          W |         23        0.23       96.36
          X |        176        1.76       98.12
          Y |        150        1.50       99.62
          Z |         38        0.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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