Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         22        0.22        0.22
          0 |        467        4.67        4.89
          1 |      1,239       12.39       17.28
          2 |      1,324       13.24       30.52
          3 |        818        8.18       38.70
          4 |      1,426       14.26       52.96
          5 |        867        8.67       61.63
          6 |        853        8.53       70.16
          7 |        422        4.22       74.38
          8 |        566        5.66       80.04
          9 |      1,018       10.18       90.22
          A |         67        0.67       90.89
          B |         33        0.33       91.22
          C |         49        0.49       91.71
          D |         38        0.38       92.09
          E |         82        0.82       92.91
          F |         42        0.42       93.33
          G |         15        0.15       93.48
          H |         28        0.28       93.76
          J |         28        0.28       94.04
          K |         18        0.18       94.22
          L |        111        1.11       95.33
          M |         35        0.35       95.68
          N |         15        0.15       95.83
          P |         29        0.29       96.12
          Q |         10        0.10       96.22
          R |         43        0.43       96.65
          S |         42        0.42       97.07
          T |         10        0.10       97.17
          U |         22        0.22       97.39
          V |         28        0.28       97.67
          W |         20        0.20       97.87
          X |         32        0.32       98.19
          Y |        111        1.11       99.30
          Z |         69        0.69       99.99
          g |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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