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

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         48        0.48        0.48
          0 |        120        1.20        1.68
          1 |      1,650       16.50       18.18
          2 |        650        6.50       24.68
          3 |        567        5.67       30.35
          4 |        545        5.45       35.80
          5 |        223        2.23       38.03
          6 |        322        3.22       41.25
          7 |        158        1.58       42.83
          8 |        173        1.73       44.56
          9 |      1,670       16.70       61.26
          A |        148        1.48       62.74
          B |        137        1.37       64.11
          C |      1,009       10.09       74.20
          D |        137        1.37       75.57
          E |        125        1.25       76.82
          F |        561        5.61       82.43
          G |        122        1.22       83.65
          H |        165        1.65       85.30
          I |          9        0.09       85.39
          J |         81        0.81       86.20
          K |         74        0.74       86.94
          L |        119        1.19       88.13
          M |         22        0.22       88.35
          N |         22        0.22       88.57
          O |         51        0.51       89.08
          P |        194        1.94       91.02
          R |        214        2.14       93.16
          S |        171        1.71       94.87
          T |        175        1.75       96.62
          U |         23        0.23       96.85
          V |         91        0.91       97.76
          W |        112        1.12       98.88
          X |         56        0.56       99.44
          Y |          9        0.09       99.53
          Z |         46        0.46       99.99
          _ |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016