Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         68        0.68        0.68
          1 |        342        3.42        4.10
          2 |        183        1.83        5.93
          3 |        118        1.18        7.11
          4 |         45        0.45        7.56
          5 |         50        0.50        8.06
          6 |         74        0.74        8.80
          7 |         44        0.44        9.24
          8 |         54        0.54        9.78
          9 |        492        4.92       14.70
          A |        282        2.82       17.52
          B |        442        4.42       21.94
          C |        344        3.44       25.38
          D |        134        1.34       26.72
          E |        131        1.31       28.03
          F |      1,158       11.58       39.61
          G |      1,710       17.10       56.71
          H |        746        7.46       64.17
          J |        198        1.98       66.15
          K |        216        2.16       68.31
          L |        279        2.79       71.10
          M |        469        4.69       75.79
          N |        594        5.94       81.73
          O |          1        0.01       81.74
          P |        146        1.46       83.20
          Q |         41        0.41       83.61
          R |        111        1.11       84.72
          S |        178        1.78       86.50
          T |        654        6.54       93.04
          U |         24        0.24       93.28
          V |        113        1.13       94.41
          W |        112        1.12       95.53
          X |        186        1.86       97.39
          Y |        160        1.60       98.99
          Z |        101        1.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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