Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         35        0.35        0.35
          1 |         33        0.33        0.68
          2 |         21        0.21        0.89
          3 |         21        0.21        1.10
          4 |          6        0.06        1.16
          5 |          5        0.05        1.21
          6 |          6        0.06        1.27
          7 |         10        0.10        1.37
          8 |         13        0.13        1.50
          9 |        422        4.22        5.72
          A |        210        2.10        7.82
          B |        484        4.84       12.66
          C |        180        1.80       14.46
          D |        150        1.50       15.96
          E |         21        0.21       16.17
          F |      1,939       19.39       35.56
          G |      2,220       22.20       57.76
          H |      1,133       11.33       69.09
          J |        191        1.91       71.00
          K |        108        1.08       72.08
          L |         94        0.94       73.02
          M |        361        3.61       76.63
          N |        696        6.96       83.59
          P |        100        1.00       84.59
          R |          7        0.07       84.66
          S |        222        2.22       86.88
          T |        760        7.60       94.48
          U |         12        0.12       94.60
          V |        183        1.83       96.43
          W |         21        0.21       96.64
          X |        173        1.73       98.37
          Y |        148        1.48       99.85
          Z |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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