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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         97        0.97        0.97
          0 |        121        1.21        2.18
          1 |         85        0.85        3.03
          2 |         90        0.90        3.93
          3 |         90        0.90        4.83
          4 |         66        0.66        5.49
          5 |         76        0.76        6.25
          6 |         67        0.67        6.92
          7 |         74        0.74        7.66
          8 |         76        0.76        8.42
          9 |        422        4.22       12.64
          A |          2        0.02       12.66
          B |        133        1.33       13.99
          C |        165        1.65       15.64
          D |        181        1.81       17.45
          E |        311        3.11       20.56
          F |        420        4.20       24.76
          G |        477        4.77       29.53
          H |        500        5.00       34.53
          J |        559        5.59       40.12
          K |        570        5.70       45.82
          L |        501        5.01       50.83
          M |        535        5.35       56.18
          N |        524        5.24       61.42
          P |        590        5.90       67.32
          R |        661        6.61       73.93
          S |        709        7.09       81.02
          T |        596        5.96       86.98
          V |        696        6.96       93.94
          W |        554        5.54       99.48
          X |         51        0.51       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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