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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        130        1.30        1.30
          0 |      1,229       12.29       13.59
          1 |      1,395       13.95       27.54
          2 |        762        7.62       35.16
          3 |        578        5.78       40.94
          4 |        451        4.51       45.45
          5 |        686        6.86       52.31
          6 |        585        5.85       58.16
          7 |        595        5.95       64.11
          8 |        378        3.78       67.89
          9 |      1,843       18.43       86.32
          A |        105        1.05       87.37
          B |         66        0.66       88.03
          C |         68        0.68       88.71
          D |         43        0.43       89.14
          E |         48        0.48       89.62
          F |         76        0.76       90.38
          G |         38        0.38       90.76
          H |        109        1.09       91.85
          I |          1        0.01       91.86
          J |         36        0.36       92.22
          K |         52        0.52       92.74
          L |        109        1.09       93.83
          M |         32        0.32       94.15
          N |         53        0.53       94.68
          O |         13        0.13       94.81
          P |         82        0.82       95.63
          Q |         15        0.15       95.78
          R |         54        0.54       96.32
          S |         79        0.79       97.11
          T |         47        0.47       97.58
          U |         52        0.52       98.10
          V |         20        0.20       98.30
          W |         25        0.25       98.55
          X |         17        0.17       98.72
          Y |         30        0.30       99.02
          Z |         98        0.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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