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

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        201        2.01        2.01
          0 |      1,665       16.65       18.66
          1 |      2,142       21.42       40.08
          2 |      1,235       12.35       52.43
          3 |        709        7.09       59.52
          4 |        422        4.22       63.74
          5 |        762        7.62       71.36
          6 |        534        5.34       76.70
          7 |        370        3.70       80.40
          8 |        215        2.15       82.55
          9 |        511        5.11       87.66
          A |        532        5.32       92.98
          B |        366        3.66       96.64
          C |        121        1.21       97.85
          D |         52        0.52       98.37
          E |         29        0.29       98.66
          F |         23        0.23       98.89
          G |         10        0.10       98.99
          H |         11        0.11       99.10
          J |         39        0.39       99.49
          K |          3        0.03       99.52
          L |          2        0.02       99.54
          M |         30        0.30       99.84
          N |          4        0.04       99.88
          P |          2        0.02       99.90
          S |          3        0.03       99.93
          T |          1        0.01       99.94
          U |          3        0.03       99.97
          W |          2        0.02       99.99
          Z |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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