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

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          5        0.05        0.05
          0 |        412        4.12        4.17
          1 |      1,126       11.26       15.43
          2 |      1,635       16.35       31.78
          3 |        942        9.42       41.20
          4 |      1,104       11.04       52.24
          5 |        729        7.29       59.53
          6 |        952        9.52       69.05
          7 |        409        4.09       73.14
          8 |        679        6.79       79.93
          9 |      1,134       11.34       91.27
          A |         84        0.84       92.11
          B |         79        0.79       92.90
          C |         92        0.92       93.82
          D |         31        0.31       94.13
          E |         79        0.79       94.92
          F |         28        0.28       95.20
          G |         15        0.15       95.35
          H |         34        0.34       95.69
          J |         22        0.22       95.91
          K |          8        0.08       95.99
          L |         57        0.57       96.56
          M |         24        0.24       96.80
          N |          3        0.03       96.83
          P |         39        0.39       97.22
          R |         29        0.29       97.51
          S |          7        0.07       97.58
          T |         20        0.20       97.78
          U |          6        0.06       97.84
          V |         35        0.35       98.19
          W |         39        0.39       98.58
          X |         17        0.17       98.75
          Y |         79        0.79       99.54
          Z |         46        0.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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