Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

        vin |
characters( |
        10) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         26        0.26        0.26
          0 |         23        0.23        0.49
          1 |        618        6.18        6.67
          2 |        617        6.17       12.84
          3 |        628        6.28       19.12
          4 |        681        6.81       25.93
          5 |        694        6.94       32.87
          6 |        570        5.70       38.57
          7 |        639        6.39       44.96
          8 |        461        4.61       49.57
          9 |        649        6.49       56.06
          A |        293        2.93       58.99
          B |        386        3.86       62.85
          C |        369        3.69       66.54
          D |         46        0.46       67.00
          E |         19        0.19       67.19
          F |         28        0.28       67.47
          G |         32        0.32       67.79
          H |         59        0.59       68.38
          J |         49        0.49       68.87
          K |         78        0.78       69.65
          L |         99        0.99       70.64
          M |        141        1.41       72.05
          N |        132        1.32       73.37
          P |        188        1.88       75.25
          R |        217        2.17       77.42
          S |        266        2.66       80.08
          T |        255        2.55       82.63
          V |        343        3.43       86.06
          W |        392        3.92       89.98
          X |        434        4.34       94.32
          Y |        568        5.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016