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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,105       81.05       81.05
          0 |        134        1.34       82.39
          1 |         95        0.95       83.34
          2 |         97        0.97       84.31
          3 |        113        1.13       85.44
          4 |         97        0.97       86.41
          5 |        116        1.16       87.57
          6 |         91        0.91       88.48
          7 |        109        1.09       89.57
          8 |        107        1.07       90.64
          9 |        817        8.17       98.81
          B |          2        0.02       98.83
          C |          1        0.01       98.84
          D |          1        0.01       98.85
          F |          6        0.06       98.91
          I |          1        0.01       98.92
          L |          1        0.01       98.93
          O |          2        0.02       98.95
          X |        102        1.02       99.97
          Z |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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