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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,925       49.25       49.25
          0 |         10        0.10       49.35
          3 |          2        0.02       49.37
          6 |          1        0.01       49.38
          7 |          1        0.01       49.39
          9 |        520        5.20       54.59
          A |          6        0.06       54.65
          B |        436        4.36       59.01
          C |        499        4.99       64.00
          D |        476        4.76       68.76
          E |        714        7.14       75.90
          F |        805        8.05       83.95
          G |        938        9.38       93.33
          H |        639        6.39       99.72
          J |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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