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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,796       37.96       37.96
          0 |         12        0.12       38.08
          1 |          1        0.01       38.09
          9 |        473        4.73       42.82
          A |          5        0.05       42.87
          B |        441        4.41       47.28
          C |        409        4.09       51.37
          D |        462        4.62       55.99
          E |        633        6.33       62.32
          F |        690        6.90       69.22
          G |        757        7.57       76.79
          H |        770        7.70       84.49
          J |        895        8.95       93.44
          K |        626        6.26       99.70
          L |         29        0.29       99.99
          S |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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