Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         50        0.50        0.50
          1 |        268        2.68        3.18
          2 |         16        0.16        3.34
          3 |         27        0.27        3.61
          4 |         34        0.34        3.95
          5 |        109        1.09        5.04
          6 |         14        0.14        5.18
          7 |         22        0.22        5.40
          8 |          9        0.09        5.49
          9 |        339        3.39        8.88
          A |        596        5.96       14.84
          B |        558        5.58       20.42
          C |        870        8.70       29.12
          D |        674        6.74       35.86
          E |      1,118       11.18       47.04
          F |        638        6.38       53.42
          G |        588        5.88       59.30
          H |        552        5.52       64.82
          I |          1        0.01       64.83
          J |        337        3.37       68.20
          K |        192        1.92       70.12
          L |        230        2.30       72.42
          M |        133        1.33       73.75
          N |        313        3.13       76.88
          P |        241        2.41       79.29
          R |        436        4.36       83.65
          S |        333        3.33       86.98
          T |         87        0.87       87.85
          U |         55        0.55       88.40
          V |        144        1.44       89.84
          W |        338        3.38       93.22
          X |         39        0.39       93.61
          Y |        254        2.54       96.15
          Z |        385        3.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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