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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,074       10.74       10.74
          0 |      1,889       18.89       29.63
          1 |        647        6.47       36.10
          2 |        683        6.83       42.93
          3 |        649        6.49       49.42
          4 |        678        6.78       56.20
          5 |        634        6.34       62.54
          6 |        569        5.69       68.23
          7 |        614        6.14       74.37
          8 |        636        6.36       80.73
          9 |      1,883       18.83       99.56
          A |         31        0.31       99.87
          B |          2        0.02       99.89
          H |          1        0.01       99.90
          I |          1        0.01       99.91
          L |          3        0.03       99.94
          O |          2        0.02       99.96
          P |          1        0.01       99.97
          S |          2        0.02       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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