Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        136        1.36        1.36
          0 |        878        8.78       10.14
          1 |        781        7.81       17.95
          2 |        653        6.53       24.48
          3 |        528        5.28       29.76
          4 |        787        7.87       37.63
          5 |        551        5.51       43.14
          6 |        429        4.29       47.43
          7 |        587        5.87       53.30
          8 |        509        5.09       58.39
          9 |      1,202       12.02       70.41
          A |        199        1.99       72.40
          B |        108        1.08       73.48
          C |        191        1.91       75.39
          D |        115        1.15       76.54
          E |         96        0.96       77.50
          F |        109        1.09       78.59
          G |        158        1.58       80.17
          H |        136        1.36       81.53
          I |          1        0.01       81.54
          J |         81        0.81       82.35
          K |         88        0.88       83.23
          L |        232        2.32       85.55
          M |         90        0.90       86.45
          N |         90        0.90       87.35
          O |          1        0.01       87.36
          P |        114        1.14       88.50
          Q |         70        0.70       89.20
          R |        167        1.67       90.87
          S |        145        1.45       92.32
          T |         27        0.27       92.59
          U |         91        0.91       93.50
          V |         66        0.66       94.16
          W |         62        0.62       94.78
          X |         91        0.91       95.69
          Y |         86        0.86       96.55
          Z |        345        3.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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