Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

        vin |
character(3 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         44        0.44        0.44
          1 |      1,145       11.45       11.89
          2 |        458        4.58       16.47
          3 |        507        5.07       21.54
          4 |        910        9.10       30.64
          5 |         30        0.30       30.94
          6 |        211        2.11       33.05
          7 |        247        2.47       35.52
          8 |        274        2.74       38.26
          9 |        352        3.52       41.78
          A |        835        8.35       50.13
          B |        191        1.91       52.04
          C |        441        4.41       56.45
          D |        618        6.18       62.63
          E |        180        1.80       64.43
          F |         80        0.80       65.23
          G |        434        4.34       69.57
          H |        151        1.51       71.08
          J |         35        0.35       71.43
          K |        270        2.70       74.13
          L |         76        0.76       74.89
          M |        568        5.68       80.57
          N |        480        4.80       85.37
          O |          1        0.01       85.38
          P |        126        1.26       86.64
          R |         22        0.22       86.86
          S |         85        0.85       87.71
          T |        648        6.48       94.19
          U |        222        2.22       96.41
          V |         76        0.76       97.17
          W |        101        1.01       98.18
          X |        122        1.22       99.40
          Y |         39        0.39       99.79
          Z |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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