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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         70        0.70        0.70
          1 |        371        3.71        4.41
          2 |        217        2.17        6.58
          3 |        133        1.33        7.91
          4 |         43        0.43        8.34
          5 |         55        0.55        8.89
          6 |         66        0.66        9.55
          7 |         66        0.66       10.21
          8 |         45        0.45       10.66
          9 |        517        5.17       15.83
          A |        322        3.22       19.05
          B |        420        4.20       23.25
          C |        367        3.67       26.92
          D |        111        1.11       28.03
          E |        146        1.46       29.49
          F |      1,121       11.21       40.70
          G |      1,676       16.76       57.46
          H |        723        7.23       64.69
          J |        195        1.95       66.64
          K |        258        2.58       69.22
          L |        316        3.16       72.38
          M |        423        4.23       76.61
          N |        559        5.59       82.20
          P |        144        1.44       83.64
          Q |         35        0.35       83.99
          R |        105        1.05       85.04
          S |        201        2.01       87.05
          T |        645        6.45       93.50
          U |         16        0.16       93.66
          V |        106        1.06       94.72
          W |         93        0.93       95.65
          X |        199        1.99       97.64
          Y |        142        1.42       99.06
          Z |         94        0.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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