Frequencies for first 10,000 rows of vin_6 variable in vehicle dataset :

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         19        0.19        0.19
          0 |        567        5.67        5.86
          1 |      2,104       21.04       26.90
          2 |      1,243       12.43       39.33
          3 |        842        8.42       47.75
          4 |        597        5.97       53.72
          5 |      1,032       10.32       64.04
          6 |        685        6.85       70.89
          7 |        481        4.81       75.70
          8 |        515        5.15       80.85
          9 |        779        7.79       88.64
          A |        178        1.78       90.42
          B |        138        1.38       91.80
          C |        111        1.11       92.91
          D |         60        0.60       93.51
          E |         52        0.52       94.03
          F |         30        0.30       94.33
          G |         46        0.46       94.79
          H |         74        0.74       95.53
          J |         47        0.47       96.00
          K |         28        0.28       96.28
          L |         47        0.47       96.75
          M |         28        0.28       97.03
          N |         15        0.15       97.18
          O |          1        0.01       97.19
          P |         24        0.24       97.43
          Q |          7        0.07       97.50
          R |         46        0.46       97.96
          S |         37        0.37       98.33
          T |         24        0.24       98.57
          U |         19        0.19       98.76
          V |         15        0.15       98.91
          W |         14        0.14       99.05
          X |         20        0.20       99.25
          Y |         18        0.18       99.43
          Z |         57        0.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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