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

        VIN |
Character(9 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         18        0.18        0.18
          0 |        866        8.66        8.84
          1 |        894        8.94       17.78
          2 |        838        8.38       26.16
          3 |        898        8.98       35.14
          4 |        892        8.92       44.06
          5 |        873        8.73       52.79
          6 |        910        9.10       61.89
          7 |        865        8.65       70.54
          8 |        859        8.59       79.13
          9 |      1,205       12.05       91.18
          A |          1        0.01       91.19
          C |          1        0.01       91.20
          J |          1        0.01       91.21
          K |          1        0.01       91.22
          N |          1        0.01       91.23
          X |        877        8.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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