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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         67        0.67        0.67
          1 |        445        4.45        5.12
          2 |        242        2.42        7.54
          3 |        169        1.69        9.23
          4 |         55        0.55        9.78
          5 |         77        0.77       10.55
          6 |         86        0.86       11.41
          7 |         71        0.71       12.12
          8 |         60        0.60       12.72
          9 |        566        5.66       18.38
          A |        301        3.01       21.39
          B |        430        4.30       25.69
          C |        346        3.46       29.15
          D |        154        1.54       30.69
          E |        161        1.61       32.30
          F |        986        9.86       42.16
          G |      1,485       14.85       57.01
          H |        744        7.44       64.45
          J |        205        2.05       66.50
          K |        261        2.61       69.11
          L |        331        3.31       72.42
          M |        438        4.38       76.80
          N |        563        5.63       82.43
          O |          2        0.02       82.45
          P |        170        1.70       84.15
          Q |         46        0.46       84.61
          R |        157        1.57       86.18
          S |        199        1.99       88.17
          T |        534        5.34       93.51
          U |         28        0.28       93.79
          V |         96        0.96       94.75
          W |        102        1.02       95.77
          X |        170        1.70       97.47
          Y |        163        1.63       99.10
          Z |         90        0.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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