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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         30        0.30        0.30
          0 |         33        0.33        0.63
          1 |        626        6.26        6.89
          2 |        657        6.57       13.46
          3 |        657        6.57       20.03
          4 |        602        6.02       26.05
          5 |        738        7.38       33.43
          6 |        713        7.13       40.56
          7 |        573        5.73       46.29
          8 |         54        0.54       46.83
          9 |        340        3.40       50.23
          A |          1        0.01       50.24
          B |         13        0.13       50.37
          C |         24        0.24       50.61
          D |         25        0.25       50.86
          E |         48        0.48       51.34
          F |         54        0.54       51.88
          G |         61        0.61       52.49
          H |        100        1.00       53.49
          J |        121        1.21       54.70
          K |        168        1.68       56.38
          L |        208        2.08       58.46
          M |        250        2.50       60.96
          N |        230        2.30       63.26
          P |        279        2.79       66.05
          R |        341        3.41       69.46
          S |        421        4.21       73.67
          T |        372        3.72       77.39
          U |          1        0.01       77.40
          V |        492        4.92       82.32
          W |        477        4.77       87.09
          X |        594        5.94       93.03
          Y |        696        6.96       99.99
          Z |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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