Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,287       42.87       42.87
          0 |         10        0.10       42.97
          2 |          1        0.01       42.98
          4 |          1        0.01       42.99
          6 |          2        0.02       43.01
          7 |          1        0.01       43.02
          9 |        521        5.21       48.23
          A |          2        0.02       48.25
          B |        475        4.75       53.00
          C |        473        4.73       57.73
          D |        464        4.64       62.37
          E |        669        6.69       69.06
          F |        755        7.55       76.61
          G |        832        8.32       84.93
          H |        846        8.46       93.39
          J |        639        6.39       99.78
          K |         22        0.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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