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

     vin_11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        264        2.64        2.64
          0 |        647        6.47        9.11
          1 |        372        3.72       12.83
          2 |        294        2.94       15.77
          3 |        156        1.56       17.33
          4 |        210        2.10       19.43
          5 |        261        2.61       22.04
          6 |        254        2.54       24.58
          7 |        259        2.59       27.17
          8 |        279        2.79       29.96
          9 |        556        5.56       35.52
          A |        390        3.90       39.42
          B |        197        1.97       41.39
          C |        608        6.08       47.47
          D |        214        2.14       49.61
          E |        223        2.23       51.84
          F |        283        2.83       54.67
          G |        155        1.55       56.22
          H |        450        4.50       60.72
          J |        160        1.60       62.32
          K |        284        2.84       65.16
          L |        285        2.85       68.01
          M |        236        2.36       70.37
          N |        193        1.93       72.30
          P |        325        3.25       75.55
          R |        245        2.45       78.00
          S |        301        3.01       81.01
          T |        192        1.92       82.93
          U |        502        5.02       87.95
          V |         84        0.84       88.79
          W |        290        2.90       91.69
          X |        180        1.80       93.49
          Y |        225        2.25       95.74
          Z |        426        4.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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