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

        vin |
character(6 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.03        0.03
          0 |        440        4.40        4.43
          1 |      2,089       20.89       25.32
          2 |      1,111       11.11       36.43
          3 |        891        8.91       45.34
          4 |        942        9.42       54.76
          5 |      1,274       12.74       67.50
          6 |        574        5.74       73.24
          7 |        525        5.25       78.49
          8 |        284        2.84       81.33
          9 |        556        5.56       86.89
          A |        191        1.91       88.80
          B |        191        1.91       90.71
          C |         84        0.84       91.55
          D |         39        0.39       91.94
          E |         57        0.57       92.51
          F |         40        0.40       92.91
          G |         50        0.50       93.41
          H |         35        0.35       93.76
          I |          1        0.01       93.77
          J |         37        0.37       94.14
          K |         23        0.23       94.37
          L |         73        0.73       95.10
          M |         55        0.55       95.65
          N |         22        0.22       95.87
          P |         47        0.47       96.34
          R |         69        0.69       97.03
          S |         70        0.70       97.73
          T |         28        0.28       98.01
          U |         30        0.30       98.31
          V |         27        0.27       98.58
          W |         41        0.41       98.99
          X |         43        0.43       99.42
          Y |         25        0.25       99.67
          Z |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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