Frequencies for first 10,000 rows of vin_11 variable in vehicle dataset :

     vin_11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        100        1.00        1.00
          0 |        543        5.43        6.43
          1 |        369        3.69       10.12
          2 |        276        2.76       12.88
          3 |         90        0.90       13.78
          4 |        181        1.81       15.59
          5 |        210        2.10       17.69
          6 |        222        2.22       19.91
          7 |        203        2.03       21.94
          8 |        177        1.77       23.71
          9 |        512        5.12       28.83
          A |        470        4.70       33.53
          B |        257        2.57       36.10
          C |        649        6.49       42.59
          D |        218        2.18       44.77
          E |        307        3.07       47.84
          F |        355        3.55       51.39
          G |        201        2.01       53.40
          H |        415        4.15       57.55
          J |        240        2.40       59.95
          K |        397        3.97       63.92
          L |        356        3.56       67.48
          M |        275        2.75       70.23
          N |        209        2.09       72.32
          P |        313        3.13       75.45
          R |        245        2.45       77.90
          S |        343        3.43       81.33
          T |        187        1.87       83.20
          U |        463        4.63       87.83
          V |         37        0.37       88.20
          W |        255        2.55       90.75
          X |        161        1.61       92.36
          Y |        229        2.29       94.65
          Z |        535        5.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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