Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         27        0.27        0.27
          1 |      1,096       10.96       11.23
          2 |        583        5.83       17.06
          3 |        526        5.26       22.32
          4 |        880        8.80       31.12
          5 |         42        0.42       31.54
          6 |        204        2.04       33.58
          7 |        254        2.54       36.12
          8 |        276        2.76       38.88
          9 |        335        3.35       42.23
          A |        869        8.69       50.92
          B |        180        1.80       52.72
          C |        466        4.66       57.38
          D |        521        5.21       62.59
          E |        191        1.91       64.50
          F |         67        0.67       65.17
          G |        361        3.61       68.78
          H |        116        1.16       69.94
          J |         39        0.39       70.33
          K |        300        3.00       73.33
          L |         65        0.65       73.98
          M |        584        5.84       79.82
          N |        447        4.47       84.29
          P |        114        1.14       85.43
          Q |          1        0.01       85.44
          R |         29        0.29       85.73
          S |         72        0.72       86.45
          T |        714        7.14       93.59
          U |        242        2.42       96.01
          V |         87        0.87       96.88
          W |        119        1.19       98.07
          X |        133        1.33       99.40
          Y |         26        0.26       99.66
          Z |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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