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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,410       34.10       34.10
          0 |         12        0.12       34.22
          9 |        446        4.46       38.68
          A |          6        0.06       38.74
          B |        412        4.12       42.86
          C |        415        4.15       47.01
          D |        396        3.96       50.97
          E |        607        6.07       57.04
          F |        707        7.07       64.11
          G |        703        7.03       71.14
          H |        730        7.30       78.44
          J |        764        7.64       86.08
          K |        831        8.31       94.39
          L |        529        5.29       99.68
          M |         31        0.31       99.99
          R |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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