Frequencies for first 10,000 rows of vin_12 variable in vehicle dataset :

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        561        5.61        5.61
          0 |      1,584       15.84       21.45
          1 |      2,006       20.06       41.51
          2 |      1,159       11.59       53.10
          3 |        744        7.44       60.54
          4 |        512        5.12       65.66
          5 |        767        7.67       73.33
          6 |        588        5.88       79.21
          7 |        343        3.43       82.64
          8 |        251        2.51       85.15
          9 |        491        4.91       90.06
          A |        498        4.98       95.04
          B |        289        2.89       97.93
          C |        102        1.02       98.95
          D |         55        0.55       99.50
          E |         11        0.11       99.61
          F |          3        0.03       99.64
          G |          1        0.01       99.65
          J |          8        0.08       99.73
          K |          3        0.03       99.76
          M |         15        0.15       99.91
          N |          1        0.01       99.92
          S |          4        0.04       99.96
          T |          1        0.01       99.97
          U |          1        0.01       99.98
          V |          1        0.01       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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