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

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        115        1.15        1.15
          0 |      1,639       16.39       17.54
          1 |      2,057       20.57       38.11
          2 |      1,209       12.09       50.20
          3 |        788        7.88       58.08
          4 |        388        3.88       61.96
          5 |        751        7.51       69.47
          6 |        506        5.06       74.53
          7 |        379        3.79       78.32
          8 |        236        2.36       80.68
          9 |        516        5.16       85.84
          A |        566        5.66       91.50
          B |        397        3.97       95.47
          C |        149        1.49       96.96
          D |         77        0.77       97.73
          E |         17        0.17       97.90
          F |         23        0.23       98.13
          G |         11        0.11       98.24
          H |         16        0.16       98.40
          J |         45        0.45       98.85
          K |         26        0.26       99.11
          L |          9        0.09       99.20
          M |         37        0.37       99.57
          N |         15        0.15       99.72
          P |          2        0.02       99.74
          R |          1        0.01       99.75
          S |          6        0.06       99.81
          T |          2        0.02       99.83
          U |          4        0.04       99.87
          V |          6        0.06       99.93
          W |          4        0.04       99.97
          Y |          2        0.02       99.99
          Z |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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