Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        425        4.25        4.25
          1 |      1,195       11.95       16.20
          2 |      1,176       11.76       27.96
          3 |        771        7.71       35.67
          4 |      1,043       10.43       46.10
          5 |        423        4.23       50.33
          6 |        647        6.47       56.80
          7 |        299        2.99       59.79
          8 |        421        4.21       64.00
          9 |        705        7.05       71.05
          A |        619        6.19       77.24
          B |        130        1.30       78.54
          C |        306        3.06       81.60
          D |        135        1.35       82.95
          E |        152        1.52       84.47
          F |         78        0.78       85.25
          G |         30        0.30       85.55
          H |         45        0.45       86.00
          I |          2        0.02       86.02
          J |         10        0.10       86.12
          K |         57        0.57       86.69
          L |        175        1.75       88.44
          M |        240        2.40       90.84
          N |         73        0.73       91.57
          O |          2        0.02       91.59
          P |         54        0.54       92.13
          Q |         16        0.16       92.29
          R |         31        0.31       92.60
          S |         95        0.95       93.55
          T |        393        3.93       97.48
          U |         91        0.91       98.39
          V |         25        0.25       98.64
          W |         52        0.52       99.16
          X |         16        0.16       99.32
          Y |         46        0.46       99.78
          Z |         22        0.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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