Frequencies for first 10,000 rows of vin_6 variable in vehicle dataset :

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        138        1.38        1.38
          - |          8        0.08        1.46
          0 |      1,444       14.44       15.90
          1 |      1,481       14.81       30.71
          2 |        809        8.09       38.80
          3 |        603        6.03       44.83
          4 |        573        5.73       50.56
          5 |        716        7.16       57.72
          6 |        396        3.96       61.68
          7 |        414        4.14       65.82
          8 |        439        4.39       70.21
          9 |      1,589       15.89       86.10
          A |         94        0.94       87.04
          B |         36        0.36       87.40
          C |         61        0.61       88.01
          D |         65        0.65       88.66
          E |         39        0.39       89.05
          F |         58        0.58       89.63
          G |         35        0.35       89.98
          H |        115        1.15       91.13
          I |          2        0.02       91.15
          J |         43        0.43       91.58
          K |         41        0.41       91.99
          L |        118        1.18       93.17
          M |         32        0.32       93.49
          N |         52        0.52       94.01
          O |         33        0.33       94.34
          P |         76        0.76       95.10
          Q |         23        0.23       95.33
          R |         66        0.66       95.99
          S |        110        1.10       97.09
          T |         74        0.74       97.83
          U |         43        0.43       98.26
          V |         25        0.25       98.51
          W |         15        0.15       98.66
          X |         15        0.15       98.81
          Y |         18        0.18       98.99
          Z |        101        1.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016