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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,962       29.62       29.62
          0 |         13        0.13       29.75
          1 |          3        0.03       29.78
          9 |        406        4.06       33.84
          A |          7        0.07       33.91
          B |        381        3.81       37.72
          C |        411        4.11       41.83
          D |        422        4.22       46.05
          E |        575        5.75       51.80
          F |        683        6.83       58.63
          G |        674        6.74       65.37
          H |        729        7.29       72.66
          J |        761        7.61       80.27
          K |        758        7.58       87.85
          L |        641        6.41       94.26
          M |        548        5.48       99.74
          N |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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