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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          4        0.04        0.04
          0 |        459        4.59        4.63
          1 |      2,463       24.63       29.26
          2 |      1,178       11.78       41.04
          3 |        919        9.19       50.23
          4 |        853        8.53       58.76
          5 |      1,382       13.82       72.58
          6 |        606        6.06       78.64
          7 |        515        5.15       83.79
          8 |        294        2.94       86.73
          9 |        482        4.82       91.55
          A |        128        1.28       92.83
          B |        131        1.31       94.14
          C |         57        0.57       94.71
          D |         57        0.57       95.28
          E |         31        0.31       95.59
          F |         23        0.23       95.82
          G |         18        0.18       96.00
          H |         36        0.36       96.36
          J |         27        0.27       96.63
          K |         14        0.14       96.77
          L |         18        0.18       96.95
          M |         42        0.42       97.37
          N |         14        0.14       97.51
          P |         16        0.16       97.67
          R |         40        0.40       98.07
          S |         46        0.46       98.53
          T |         15        0.15       98.68
          U |         26        0.26       98.94
          V |         15        0.15       99.09
          W |         31        0.31       99.40
          X |         27        0.27       99.67
          Y |          9        0.09       99.76
          Z |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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