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

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        898        8.98        8.98
          0 |      1,580       15.80       24.78
          1 |      2,016       20.16       44.94
          2 |      1,116       11.16       56.10
          3 |        692        6.92       63.02
          4 |        532        5.32       68.34
          5 |        692        6.92       75.26
          6 |        550        5.50       80.76
          7 |        362        3.62       84.38
          8 |        244        2.44       86.82
          9 |        554        5.54       92.36
          A |        402        4.02       96.38
          B |        210        2.10       98.48
          C |         73        0.73       99.21
          D |         36        0.36       99.57
          E |         11        0.11       99.68
          F |          1        0.01       99.69
          G |          1        0.01       99.70
          H |          1        0.01       99.71
          J |          4        0.04       99.75
          K |          3        0.03       99.78
          L |          1        0.01       99.79
          M |          9        0.09       99.88
          N |          1        0.01       99.89
          S |          5        0.05       99.94
          T |          1        0.01       99.95
          X |          2        0.02       99.97
          Z |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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