Frequencies for first 10,000 rows of vin_1 variable in vehicle dataset :

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         76        0.76        0.76
          1 |      3,628       36.28       37.04
          2 |        493        4.93       41.97
          3 |        296        2.96       44.93
          4 |        225        2.25       47.18
          5 |         84        0.84       48.02
          6 |        177        1.77       49.79
          7 |         76        0.76       50.55
          8 |         90        0.90       51.45
          9 |        636        6.36       57.81
          A |         60        0.60       58.41
          B |         61        0.61       59.02
          C |        473        4.73       63.75
          D |         61        0.61       64.36
          E |         83        0.83       65.19
          F |        283        2.83       68.02
          G |         70        0.70       68.72
          H |        119        1.19       69.91
          I |          8        0.08       69.99
          J |      1,892       18.92       88.91
          K |        150        1.50       90.41
          L |         36        0.36       90.77
          M |         21        0.21       90.98
          N |         27        0.27       91.25
          P |         45        0.45       91.70
          R |        184        1.84       93.54
          S |        162        1.62       95.16
          T |        171        1.71       96.87
          U |         19        0.19       97.06
          V |         61        0.61       97.67
          W |        170        1.70       99.37
          X |         18        0.18       99.55
          Y |         26        0.26       99.81
          Z |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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