Frequencies for first 10,000 rows of vin_12 variable in vehicle dataset :

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        124        1.24        1.24
          0 |      1,570       15.70       16.94
          1 |      2,112       21.12       38.06
          2 |      1,236       12.36       50.42
          3 |        787        7.87       58.29
          4 |        426        4.26       62.55
          5 |        730        7.30       69.85
          6 |        500        5.00       74.85
          7 |        365        3.65       78.50
          8 |        213        2.13       80.63
          9 |        575        5.75       86.38
          A |        519        5.19       91.57
          B |        352        3.52       95.09
          C |        146        1.46       96.55
          D |         78        0.78       97.33
          E |         26        0.26       97.59
          F |         24        0.24       97.83
          G |         13        0.13       97.96
          H |         19        0.19       98.15
          J |         54        0.54       98.69
          K |         20        0.20       98.89
          L |         14        0.14       99.03
          M |         32        0.32       99.35
          N |         18        0.18       99.53
          P |          7        0.07       99.60
          R |          5        0.05       99.65
          S |          5        0.05       99.70
          T |          2        0.02       99.72
          U |         15        0.15       99.87
          V |          5        0.05       99.92
          W |          5        0.05       99.97
          Y |          1        0.01       99.98
          Z |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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