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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        353        3.53        3.53
          1 |      1,266       12.66       16.19
          2 |      1,086       10.86       27.05
          3 |        825        8.25       35.30
          4 |        977        9.77       45.07
          5 |        321        3.21       48.28
          6 |        574        5.74       54.02
          7 |        280        2.80       56.82
          8 |        340        3.40       60.22
          9 |        617        6.17       66.39
          A |        691        6.91       73.30
          B |        160        1.60       74.90
          C |        402        4.02       78.92
          D |        166        1.66       80.58
          E |        127        1.27       81.85
          F |         69        0.69       82.54
          G |         33        0.33       82.87
          H |         92        0.92       83.79
          I |          1        0.01       83.80
          J |         20        0.20       84.00
          K |         72        0.72       84.72
          L |        165        1.65       86.37
          M |        288        2.88       89.25
          N |         81        0.81       90.06
          O |          2        0.02       90.08
          P |         54        0.54       90.62
          Q |          3        0.03       90.65
          R |         15        0.15       90.80
          S |        109        1.09       91.89
          T |        480        4.80       96.69
          U |        124        1.24       97.93
          V |         40        0.40       98.33
          W |         66        0.66       98.99
          X |         16        0.16       99.15
          Y |         72        0.72       99.87
          Z |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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