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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         16        0.16        0.16
          0 |        893        8.93        9.09
          1 |        920        9.20       18.29
          2 |        847        8.47       26.76
          3 |        855        8.55       35.31
          4 |        865        8.65       43.96
          5 |        845        8.45       52.41
          6 |        929        9.29       61.70
          7 |        877        8.77       70.47
          8 |        859        8.59       79.06
          9 |      1,226       12.26       91.32
          B |          1        0.01       91.33
          C |          1        0.01       91.34
          T |          1        0.01       91.35
          X |        864        8.64       99.99
          Z |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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