Frequencies for first 10,000 rows of vin_9 variable in vehicle dataset :

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,344       23.44       23.44
          0 |        697        6.97       30.41
          1 |        651        6.51       36.92
          2 |        654        6.54       43.46
          3 |        611        6.11       49.57
          4 |        646        6.46       56.03
          5 |        680        6.80       62.83
          6 |        703        7.03       69.86
          7 |        637        6.37       76.23
          8 |        666        6.66       82.89
          9 |        993        9.93       92.82
          A |          1        0.01       92.83
          B |          1        0.01       92.84
          D |          2        0.02       92.86
          F |          4        0.04       92.90
          G |          3        0.03       92.93
          H |          1        0.01       92.94
          I |          1        0.01       92.95
          K |          3        0.03       92.98
          L |          2        0.02       93.00
          M |          1        0.01       93.01
          O |          8        0.08       93.09
          P |          1        0.01       93.10
          R |          1        0.01       93.11
          S |          5        0.05       93.16
          U |          2        0.02       93.18
          X |        679        6.79       99.97
          Z |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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