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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        277        2.77        2.77
          1 |      1,248       12.48       15.25
          2 |      1,054       10.54       25.79
          3 |        800        8.00       33.79
          4 |      1,028       10.28       44.07
          5 |        307        3.07       47.14
          6 |        563        5.63       52.77
          7 |        244        2.44       55.21
          8 |        335        3.35       58.56
          9 |        586        5.86       64.42
          A |        747        7.47       71.89
          B |        137        1.37       73.26
          C |        386        3.86       77.12
          D |        175        1.75       78.87
          E |        148        1.48       80.35
          F |         65        0.65       81.00
          G |         55        0.55       81.55
          H |         94        0.94       82.49
          J |         21        0.21       82.70
          K |         70        0.70       83.40
          L |        137        1.37       84.77
          M |        324        3.24       88.01
          N |         98        0.98       88.99
          P |         60        0.60       89.59
          Q |          8        0.08       89.67
          R |         22        0.22       89.89
          S |        119        1.19       91.08
          T |        507        5.07       96.15
          U |        145        1.45       97.60
          V |         55        0.55       98.15
          W |         78        0.78       98.93
          X |         28        0.28       99.21
          Y |         63        0.63       99.84
          Z |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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