Frequencies for first 10,000 rows of vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          7        0.07        0.07
          1 |      5,081       50.81       50.88
          2 |        963        9.63       60.51
          3 |        417        4.17       64.68
          4 |        494        4.94       69.62
          5 |        276        2.76       72.38
          6 |         14        0.14       72.52
          8 |          1        0.01       72.53
          9 |        319        3.19       75.72
          A |          7        0.07       75.79
          B |          1        0.01       75.80
          C |         18        0.18       75.98
          D |          2        0.02       76.00
          E |          1        0.01       76.01
          F |         17        0.17       76.18
          H |          1        0.01       76.19
          J |      1,759       17.59       93.78
          K |        211        2.11       95.89
          L |         15        0.15       96.04
          M |          1        0.01       96.05
          P |          1        0.01       96.06
          R |          6        0.06       96.12
          S |         50        0.50       96.62
          T |         12        0.12       96.74
          U |          4        0.04       96.78
          V |         10        0.10       96.88
          W |        232        2.32       99.20
          X |          1        0.01       99.21
          Y |         51        0.51       99.72
          Z |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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