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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        107        1.07        1.07
          1 |        342        3.42        4.49
          2 |        242        2.42        6.91
          3 |        164        1.64        8.55
          4 |        136        1.36        9.91
          5 |        103        1.03       10.94
          6 |         61        0.61       11.55
          7 |        232        2.32       13.87
          8 |         55        0.55       14.42
          9 |        492        4.92       19.34
          A |        863        8.63       27.97
          B |        965        9.65       37.62
          C |        972        9.72       47.34
          D |        490        4.90       52.24
          E |        758        7.58       59.82
          F |        466        4.66       64.48
          G |        354        3.54       68.02
          H |        453        4.53       72.55
          J |        220        2.20       74.75
          K |        116        1.16       75.91
          L |        284        2.84       78.75
          M |        134        1.34       80.09
          N |        227        2.27       82.36
          O |          1        0.01       82.37
          P |        350        3.50       85.87
          R |        405        4.05       89.92
          S |        288        2.88       92.80
          T |         59        0.59       93.39
          U |         72        0.72       94.11
          V |        132        1.32       95.43
          W |        154        1.54       96.97
          X |         82        0.82       97.79
          Y |        155        1.55       99.34
          Z |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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