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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          7        0.07        0.07
          0 |         49        0.49        0.56
          1 |        275        2.75        3.31
          2 |        128        1.28        4.59
          3 |         80        0.80        5.39
          4 |         44        0.44        5.83
          5 |         33        0.33        6.16
          6 |         44        0.44        6.60
          7 |         47        0.47        7.07
          8 |         46        0.46        7.53
          9 |        361        3.61       11.14
          A |        268        2.68       13.82
          B |        475        4.75       18.57
          C |        284        2.84       21.41
          D |        115        1.15       22.56
          E |        106        1.06       23.62
          F |      1,394       13.94       37.56
          G |      2,124       21.24       58.80
          H |        713        7.13       65.93
          J |        192        1.92       67.85
          K |        165        1.65       69.50
          L |        204        2.04       71.54
          M |        489        4.89       76.43
          N |        602        6.02       82.45
          O |          2        0.02       82.47
          P |        175        1.75       84.22
          Q |         29        0.29       84.51
          R |         73        0.73       85.24
          S |        179        1.79       87.03
          T |        691        6.91       93.94
          U |          9        0.09       94.03
          V |        107        1.07       95.10
          W |         73        0.73       95.83
          X |        191        1.91       97.74
          Y |        150        1.50       99.24
          Z |         76        0.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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