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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,410       34.10       34.10
          0 |        576        5.76       39.86
          1 |        541        5.41       45.27
          2 |        550        5.50       50.77
          3 |        566        5.66       56.43
          4 |        525        5.25       61.68
          5 |        515        5.15       66.83
          6 |        591        5.91       72.74
          7 |        568        5.68       78.42
          8 |        567        5.67       84.09
          9 |      1,001       10.01       94.10
          A |          3        0.03       94.13
          B |          4        0.04       94.17
          C |          2        0.02       94.19
          D |          2        0.02       94.21
          E |          2        0.02       94.23
          F |          7        0.07       94.30
          G |          4        0.04       94.34
          H |          1        0.01       94.35
          L |          1        0.01       94.36
          O |          2        0.02       94.38
          S |          6        0.06       94.44
          U |          1        0.01       94.45
          X |        548        5.48       99.93
          Y |          2        0.02       99.95
          Z |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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