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

      vin_1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         96        0.96        0.96
          1 |      3,409       34.09       35.05
          2 |        474        4.74       39.79
          3 |        302        3.02       42.81
          4 |        261        2.61       45.42
          5 |         91        0.91       46.33
          6 |        194        1.94       48.27
          7 |         96        0.96       49.23
          8 |         96        0.96       50.19
          9 |        655        6.55       56.74
          A |         90        0.90       57.64
          B |         69        0.69       58.33
          C |        565        5.65       63.98
          D |         81        0.81       64.79
          E |        106        1.06       65.85
          F |        290        2.90       68.75
          G |         83        0.83       69.58
          H |        166        1.66       71.24
          I |          6        0.06       71.30
          J |      1,771       17.71       89.01
          K |        106        1.06       90.07
          L |         39        0.39       90.46
          M |         24        0.24       90.70
          N |         21        0.21       90.91
          O |          3        0.03       90.94
          P |         59        0.59       91.53
          R |        193        1.93       93.46
          S |        186        1.86       95.32
          T |        170        1.70       97.02
          U |         13        0.13       97.15
          V |         59        0.59       97.74
          W |        165        1.65       99.39
          X |         16        0.16       99.55
          Y |         21        0.21       99.76
          Z |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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