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

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         23        0.23        0.23
          1 |      5,364       53.64       53.87
          2 |        888        8.88       62.75
          3 |        212        2.12       64.87
          4 |        352        3.52       68.39
          5 |         16        0.16       68.55
          6 |         32        0.32       68.87
          7 |         11        0.11       68.98
          8 |         16        0.16       69.14
          9 |        377        3.77       72.91
          A |          8        0.08       72.99
          B |         21        0.21       73.20
          C |        161        1.61       74.81
          D |         10        0.10       74.91
          E |         22        0.22       75.13
          F |         99        0.99       76.12
          G |         14        0.14       76.26
          H |         27        0.27       76.53
          J |      1,851       18.51       95.04
          K |        133        1.33       96.37
          L |          5        0.05       96.42
          M |          4        0.04       96.46
          N |          2        0.02       96.48
          P |          7        0.07       96.55
          R |         30        0.30       96.85
          S |         37        0.37       97.22
          T |         41        0.41       97.63
          U |         11        0.11       97.74
          V |         17        0.17       97.91
          W |        159        1.59       99.50
          X |          1        0.01       99.51
          Y |         42        0.42       99.93
          Z |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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