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

     vin_10 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,426       54.26       54.26
          0 |         11        0.11       54.37
          1 |          1        0.01       54.38
          6 |          2        0.02       54.40
          9 |        504        5.04       59.44
          A |          7        0.07       59.51
          B |        535        5.35       64.86
          C |        581        5.81       70.67
          D |        521        5.21       75.88
          E |        779        7.79       83.67
          F |        878        8.78       92.45
          G |        720        7.20       99.65
          H |         34        0.34       99.99
          U |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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