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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,042       10.42       10.42
          0 |      1,939       19.39       29.81
          1 |        735        7.35       37.16
          2 |        746        7.46       44.62
          3 |        746        7.46       52.08
          4 |        685        6.85       58.93
          5 |        731        7.31       66.24
          6 |        716        7.16       73.40
          7 |        697        6.97       80.37
          8 |        653        6.53       86.90
          9 |      1,257       12.57       99.47
          A |         30        0.30       99.77
          B |         14        0.14       99.91
          C |          4        0.04       99.95
          D |          2        0.02       99.97
          I |          1        0.01       99.98
          P |          1        0.01       99.99
          U |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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