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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         19        0.19        0.19
          0 |        710        7.10        7.29
          1 |      1,911       19.11       26.40
          2 |      1,176       11.76       38.16
          3 |        787        7.87       46.03
          4 |        601        6.01       52.04
          5 |        826        8.26       60.30
          6 |        738        7.38       67.68
          7 |        530        5.30       72.98
          8 |        593        5.93       78.91
          9 |        916        9.16       88.07
          A |        225        2.25       90.32
          B |        117        1.17       91.49
          C |         97        0.97       92.46
          D |         96        0.96       93.42
          E |         55        0.55       93.97
          F |         52        0.52       94.49
          G |         46        0.46       94.95
          H |         78        0.78       95.73
          J |         50        0.50       96.23
          K |         32        0.32       96.55
          L |         32        0.32       96.87
          M |         29        0.29       97.16
          N |         18        0.18       97.34
          P |         26        0.26       97.60
          Q |          4        0.04       97.64
          R |         26        0.26       97.90
          S |         34        0.34       98.24
          T |         31        0.31       98.55
          U |         28        0.28       98.83
          V |         21        0.21       99.04
          W |         22        0.22       99.26
          X |         20        0.20       99.46
          Y |         19        0.19       99.65
          Z |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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