Frequencies for first 10,000 rows of vin_6 variable in vehicle dataset :

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         32        0.32        0.32
          0 |        743        7.43        7.75
          1 |      1,885       18.85       26.60
          2 |      1,149       11.49       38.09
          3 |        712        7.12       45.21
          4 |        627        6.27       51.48
          5 |        819        8.19       59.67
          6 |        756        7.56       67.23
          7 |        583        5.83       73.06
          8 |        544        5.44       78.50
          9 |        907        9.07       87.57
          A |        247        2.47       90.04
          B |        115        1.15       91.19
          C |        102        1.02       92.21
          D |         89        0.89       93.10
          E |         54        0.54       93.64
          F |         37        0.37       94.01
          G |         53        0.53       94.54
          H |         99        0.99       95.53
          I |          1        0.01       95.54
          J |         45        0.45       95.99
          K |         33        0.33       96.32
          L |         45        0.45       96.77
          M |         25        0.25       97.02
          N |         21        0.21       97.23
          P |         44        0.44       97.67
          Q |          4        0.04       97.71
          R |         30        0.30       98.01
          S |         42        0.42       98.43
          T |         23        0.23       98.66
          U |         21        0.21       98.87
          V |         18        0.18       99.05
          W |         17        0.17       99.22
          X |          8        0.08       99.30
          Y |         20        0.20       99.50
          Z |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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