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

        vin |
character(2 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.03        0.03
          0 |         26        0.26        0.29
          1 |          4        0.04        0.33
          2 |          7        0.07        0.40
          3 |          5        0.05        0.45
          4 |          4        0.04        0.49
          5 |         22        0.22        0.71
          6 |          5        0.05        0.76
          7 |          5        0.05        0.81
          8 |         10        0.10        0.91
          9 |        540        5.40        6.31
          A |        200        2.00        8.31
          B |        402        4.02       12.33
          C |        299        2.99       15.32
          D |        296        2.96       18.28
          E |          9        0.09       18.37
          F |      1,527       15.27       33.64
          G |      1,739       17.39       51.03
          H |      1,176       11.76       62.79
          J |        218        2.18       64.97
          K |        128        1.28       66.25
          L |        113        1.13       67.38
          M |        374        3.74       71.12
          N |        902        9.02       80.14
          O |          1        0.01       80.15
          P |         45        0.45       80.60
          R |          6        0.06       80.66
          S |        229        2.29       82.95
          T |      1,019       10.19       93.14
          U |         18        0.18       93.32
          V |        233        2.33       95.65
          W |          4        0.04       95.69
          X |        158        1.58       97.27
          Y |        222        2.22       99.49
          Z |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016