Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        414        4.14        4.14
          1 |        976        9.76       13.90
          2 |        807        8.07       21.97
          3 |        538        5.38       27.35
          4 |        416        4.16       31.51
          5 |        381        3.81       35.32
          6 |        214        2.14       37.46
          7 |        848        8.48       45.94
          8 |        295        2.95       48.89
          9 |      1,096       10.96       59.85
          A |        803        8.03       67.88
          B |        663        6.63       74.51
          C |        313        3.13       77.64
          D |        129        1.29       78.93
          E |        185        1.85       80.78
          F |        123        1.23       82.01
          G |        220        2.20       84.21
          H |        184        1.84       86.05
          I |          2        0.02       86.07
          J |         72        0.72       86.79
          K |         84        0.84       87.63
          L |         64        0.64       88.27
          M |        106        1.06       89.33
          N |        111        1.11       90.44
          O |          2        0.02       90.46
          P |        158        1.58       92.04
          Q |          3        0.03       92.07
          R |        290        2.90       94.97
          S |        158        1.58       96.55
          T |         64        0.64       97.19
          U |         56        0.56       97.75
          V |         11        0.11       97.86
          W |         23        0.23       98.09
          X |          7        0.07       98.16
          Y |        122        1.22       99.38
          Z |         62        0.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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