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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         22        0.22        0.22
          1 |         66        0.66        0.88
          2 |         42        0.42        1.30
          3 |         16        0.16        1.46
          4 |          6        0.06        1.52
          5 |         12        0.12        1.64
          6 |          6        0.06        1.70
          7 |         12        0.12        1.82
          8 |         29        0.29        2.11
          9 |        413        4.13        6.24
          A |        209        2.09        8.33
          B |        611        6.11       14.44
          C |        177        1.77       16.21
          D |         67        0.67       16.88
          E |         29        0.29       17.17
          F |      1,919       19.19       36.36
          G |      2,253       22.53       58.89
          H |      1,082       10.82       69.71
          J |        174        1.74       71.45
          K |        101        1.01       72.46
          L |         86        0.86       73.32
          M |        386        3.86       77.18
          N |        700        7.00       84.18
          P |        120        1.20       85.38
          Q |          2        0.02       85.40
          R |         17        0.17       85.57
          S |        183        1.83       87.40
          T |        743        7.43       94.83
          U |         10        0.10       94.93
          V |        152        1.52       96.45
          W |         19        0.19       96.64
          X |        157        1.57       98.21
          Y |        142        1.42       99.63
          Z |         37        0.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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