Frequencies for first 10,000 rows of vin_10 variable in vehicle dataset :

        vin |
character(1 |
         0) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         34        0.34        0.34
          0 |         20        0.20        0.54
          1 |        506        5.06        5.60
          2 |        565        5.65       11.25
          3 |        593        5.93       17.18
          4 |        599        5.99       23.17
          5 |        634        6.34       29.51
          6 |        606        6.06       35.57
          7 |        626        6.26       41.83
          8 |        460        4.60       46.43
          9 |        686        6.86       53.29
          A |        297        2.97       56.26
          B |        335        3.35       59.61
          C |        459        4.59       64.20
          D |        514        5.14       69.34
          E |        394        3.94       73.28
          F |         48        0.48       73.76
          G |         23        0.23       73.99
          H |         34        0.34       74.33
          J |         51        0.51       74.84
          K |         57        0.57       75.41
          L |         58        0.58       75.99
          M |         83        0.83       76.82
          N |         95        0.95       77.77
          P |        126        1.26       79.03
          R |        140        1.40       80.43
          S |        208        2.08       82.51
          T |        209        2.09       84.60
          V |        310        3.10       87.70
          W |        321        3.21       90.91
          X |        390        3.90       94.81
          Y |        519        5.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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