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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,925       49.25       49.25
          0 |        448        4.48       53.73
          1 |        400        4.00       57.73
          2 |        421        4.21       61.94
          3 |        395        3.95       65.89
          4 |        407        4.07       69.96
          5 |        390        3.90       73.86
          6 |        414        4.14       78.00
          7 |        418        4.18       82.18
          8 |        429        4.29       86.47
          9 |        917        9.17       95.64
          A |          4        0.04       95.68
          B |          1        0.01       95.69
          D |          1        0.01       95.70
          F |          6        0.06       95.76
          G |          2        0.02       95.78
          H |          1        0.01       95.79
          I |          1        0.01       95.80
          K |          2        0.02       95.82
          L |          1        0.01       95.83
          S |          6        0.06       95.89
          U |          1        0.01       95.90
          X |        408        4.08       99.98
          Z |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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