Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         41        0.41        0.41
          0 |        567        5.67        6.08
          1 |      1,320       13.20       19.28
          2 |        789        7.89       27.17
          3 |        741        7.41       34.58
          4 |      1,465       14.65       49.23
          5 |        727        7.27       56.50
          6 |        755        7.55       64.05
          7 |        588        5.88       69.93
          8 |        524        5.24       75.17
          9 |      1,037       10.37       85.54
          A |         91        0.91       86.45
          B |         37        0.37       86.82
          C |        104        1.04       87.86
          D |         38        0.38       88.24
          E |         42        0.42       88.66
          F |         63        0.63       89.29
          G |         54        0.54       89.83
          H |         56        0.56       90.39
          J |         63        0.63       91.02
          K |         30        0.30       91.32
          L |        145        1.45       92.77
          M |         52        0.52       93.29
          N |         36        0.36       93.65
          O |          1        0.01       93.66
          P |         48        0.48       94.14
          Q |         27        0.27       94.41
          R |         62        0.62       95.03
          S |         71        0.71       95.74
          T |         13        0.13       95.87
          U |         44        0.44       96.31
          V |         25        0.25       96.56
          W |         25        0.25       96.81
          X |         57        0.57       97.38
          Y |        129        1.29       98.67
          Z |        133        1.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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