Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

        VIN |
Character(7 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          5        0.05        0.05
          0 |        411        4.11        4.16
          1 |        923        9.23       13.39
          2 |      1,506       15.06       28.45
          3 |      1,028       10.28       38.73
          4 |        960        9.60       48.33
          5 |        675        6.75       55.08
          6 |      1,040       10.40       65.48
          7 |        442        4.42       69.90
          8 |        884        8.84       78.74
          9 |      1,001       10.01       88.75
          A |         95        0.95       89.70
          B |         84        0.84       90.54
          C |        155        1.55       92.09
          D |         70        0.70       92.79
          E |        125        1.25       94.04
          F |         56        0.56       94.60
          G |         27        0.27       94.87
          H |         42        0.42       95.29
          J |         33        0.33       95.62
          K |         21        0.21       95.83
          L |         63        0.63       96.46
          M |         31        0.31       96.77
          N |          7        0.07       96.84
          P |         57        0.57       97.41
          R |         24        0.24       97.65
          S |         12        0.12       97.77
          T |         23        0.23       98.00
          U |          5        0.05       98.05
          V |         42        0.42       98.47
          W |         74        0.74       99.21
          X |         11        0.11       99.32
          Y |         45        0.45       99.77
          Z |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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