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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         60        0.60        0.60
          0 |         46        0.46        1.06
          1 |        791        7.91        8.97
          2 |        627        6.27       15.24
          3 |         96        0.96       16.20
          4 |         52        0.52       16.72
          5 |         34        0.34       17.06
          6 |         35        0.35       17.41
          7 |         41        0.41       17.82
          8 |         25        0.25       18.07
          9 |        428        4.28       22.35
          A |          1        0.01       22.36
          B |         55        0.55       22.91
          C |         62        0.62       23.53
          D |         74        0.74       24.27
          E |        140        1.40       25.67
          F |        188        1.88       27.55
          G |        228        2.28       29.83
          H |        270        2.70       32.53
          J |        313        3.13       35.66
          K |        349        3.49       39.15
          L |        376        3.76       42.91
          M |        430        4.30       47.21
          N |        424        4.24       51.45
          P |        488        4.88       56.33
          R |        520        5.20       61.53
          S |        633        6.33       67.86
          T |        548        5.48       73.34
          U |          2        0.02       73.36
          V |        574        5.74       79.10
          W |        618        6.18       85.28
          X |        715        7.15       92.43
          Y |        757        7.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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