Frequencies for first 10,000 rows of vin_11 variable in vehicle dataset :

     vin_11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        305        3.05        3.05
          0 |        694        6.94        9.99
          1 |        387        3.87       13.86
          2 |        290        2.90       16.76
          3 |        191        1.91       18.67
          4 |        212        2.12       20.79
          5 |        286        2.86       23.65
          6 |        289        2.89       26.54
          7 |        269        2.69       29.23
          8 |        310        3.10       32.33
          9 |        593        5.93       38.26
          A |        345        3.45       41.71
          B |        172        1.72       43.43
          C |        591        5.91       49.34
          D |        177        1.77       51.11
          E |        202        2.02       53.13
          F |        296        2.96       56.09
          G |        159        1.59       57.68
          H |        455        4.55       62.23
          J |        175        1.75       63.98
          K |        293        2.93       66.91
          L |        236        2.36       69.27
          M |        230        2.30       71.57
          N |        151        1.51       73.08
          P |        284        2.84       75.92
          R |        234        2.34       78.26
          S |        321        3.21       81.47
          T |        155        1.55       83.02
          U |        491        4.91       87.93
          V |         77        0.77       88.70
          W |        286        2.86       91.56
          X |        229        2.29       93.85
          Y |        201        2.01       95.86
          Z |        414        4.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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