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

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        108        1.08        1.08
          0 |      1,700       17.00       18.08
          1 |      2,121       21.21       39.29
          2 |      1,210       12.10       51.39
          3 |        721        7.21       58.60
          4 |        455        4.55       63.15
          5 |        768        7.68       70.83
          6 |        490        4.90       75.73
          7 |        343        3.43       79.16
          8 |        222        2.22       81.38
          9 |        517        5.17       86.55
          A |        521        5.21       91.76
          B |        320        3.20       94.96
          C |        152        1.52       96.48
          D |         80        0.80       97.28
          E |         25        0.25       97.53
          F |         12        0.12       97.65
          G |         11        0.11       97.76
          H |          8        0.08       97.84
          J |         56        0.56       98.40
          K |         15        0.15       98.55
          L |          5        0.05       98.60
          M |         49        0.49       99.09
          N |         19        0.19       99.28
          P |          5        0.05       99.33
          R |          9        0.09       99.42
          S |          3        0.03       99.45
          T |          8        0.08       99.53
          U |         11        0.11       99.64
          V |         20        0.20       99.84
          W |          5        0.05       99.89
          X |          6        0.06       99.95
          Y |          4        0.04       99.99
          Z |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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